build: Add some required modules for node

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diff --git a/node_modules/browserslist/CHANGELOG.md b/node_modules/browserslist/CHANGELOG.md
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+# Change Log
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## 4.7
+* Add PhantomJS queries.
+* Improve docs (by Dorian Koehring).
+
+## 4.6.6
+* Remove Safari from `dead` query.
+
+## 4.6.5
+* Add Samsung 4 browser to `dead` query.
+* Remove dirty fix for `android all` error.
+
+## 4.6.4
+* Add Firefox 68 to `Firefox ESR` query.
+
+## 4.6.3
+* Dirty fix for `android all` error.
+
+## 4.6.2
+* Fix `last x version` and similar queries for Android (by Tony Ross).
+
+## 4.6.1
+* Fix patch version support for Electron (by Kilian Valkhof).
+
+## 4.6
+* Add `mobileToDesktop` option (by Nicolò Ribaudo).
+
+## 4.5.6
+* Make `Node > 5` and `node > 5` queries case insensitive.
+
+## 4.5.5
+* Fix CLI help (by Marcel Gerber).
+* Add KaiOS browser to docs.
+
+## 4.5.4
+* Update docs (by Andrew Leedham and Dan Onoshko).
+
+## 4.5.3
+* Fix splitting string to queries.
+
+## 4.5.2
+* Show default browsers in CLI on project without config.
+
+## 4.5.1
+* Improve text for the warning about outdated `caniuse-lite`.
+
+## 4.5
+* Add `>=`, `>`, and `<=` support for Node.js version (by Mathspy Terabithian).
+
+## 4.4.2
+* Allow to have string in `package.json` (by @dmarkhas).
+
+## 4.4.1
+* Allow to use `.` in scope name of shareable config (by Gustav Nikolaj).
+
+## 4.4
+* Added `and` and `or` keywords to combine queries (by Jon Ege Ronnenberg).
+
+## 4.3.7
+* Fix fraction years support in `last 1.5 years` (by Clément P).
+* Fix version-less browser support.
+
+## 4.3.6
+* Fix version-less browser support in custom statistics (by Alex Walter).
+
+## 4.3.5
+* Fix `not` query for wrong Can I Use data.
+
+## 4.3.4
+* Allow to update `node-releases` without new Browserslist releases.
+
+## 4.3.3
+* Fix Node.js 11 support.
+
+## 4.3.2
+* Fix `Unknown version 11 of Node.js` error (by Dan Onoshko).
+
+## 4.3.1
+* Fix conflict between `caniuse-lite` and custom browsers statistics.
+
+## 4.3
+* Allow to use `extends browserslist-config-a/file` (by @Schweinepriester).
+
+## 4.2.1
+* Use new `node-releases` support (by Sergey Rubanov).
+
+## 4.2
+* Add `--json` argument for CLI.
+* Allow to pass multiple areas in CLI by `--coverage=US,alt-AS,global`.
+
+## 4.1.2
+* Better `unknow query` error message.
+* Use latest `node-releases`.
+
+## 4.1.1
+* Update Firefox ESR versions.
+
+## 4.1
+* Add `current node` query.
+* Add contributors widget to docs (by Sergey Surkov).
+
+## 4.0.2
+* Fix new `node-releases` support (by Sergey Rubanov).
+* Fix error text (by Josh Smith).
+
+## 4.0.1
+* Reduce npm package size.
+* Fix docs.
+
+## 4.0.0 “Erinaceus amurensis”
+* Add `node X` and `maintained node versions` queries (by Pavel Vostrikov).
+* Remove Node.js 4 support.
+* Show warning if `caniuse-lite` is old (by Anton Tuzhik).
+* Add comma support in config file.
+
+## 3.2.8
+* Add IE 9-5.5 to dead browsers.
+* Remove development configs from npm package.
+
+## 3.2.7
+* Add Firefox 60 as Firefox ESR.
+
+## 3.2.6
+* Add Opera Mini 12 to dead browsers.
+* Update docs (by Jamie Kyle).
+
+## 3.2.5
+* Fix excluding Opera Mini and other browsers with `all` version.
+
+## 3.2.4
+* Resolve shareable config from current working directory.
+
+## 3.2.3
+* Fix `package.json` config validation for single string case.
+* Fix CLI error reporting.
+
+## 3.2.2
+* Add `package.json` config validation.
+* Move project to `browserlist` GitHub organization.
+
+## 3.2.1
+* Fix error text (by Steve Schrab).
+
+## 3.2
+* Add `cover 99%` query (by Vasily Fedoseyev).
+* Add `cover 99% in US` query (by Vasily Fedoseyev).
+* Add `cover 99% in my stats` query (by Vasily Fedoseyev).
+* Add `"my stats"` support to `browserlist.coverage()` (by Vasily Fedoseyev).
+
+## 3.1.2
+* Add more clear error on missed browser version.
+
+## 3.1.1
+* Fix JSDoc (by Sylvain Pollet-Villard).
+
+## 3.1
+* Add `ignoreUnknownVersions` option.
+* Fix docs (by Pascal Duez).
+
+## 3.0 “Atelerix sclateri”
+* Remove country statistics from client-side build of Browserslist.
+* Change `> 1%` to `> 0.5%` in default query.
+* Add `not dead` to default query.
+* Change default environment to `production` (by Marco Fugaro).
+* Add `dead` query support with IE 10 and BlackBerry browser.
+* Add multiple environments in one section support (by Evilebot Tnawi).
+* Add custom statistics support to `browserlist.coverage()`.
+* Fix `path` option check.
+
+## 2.11.3
+* Fix for `path: undefined` option.
+
+## 2.11.2
+* Remove Node.js specific code from webpack build.
+
+## 2.11.1
+* Fix using Browserslist in browser with `path` but without `fs`.
+
+## 2.11
+* Add `last 2 years` query support (by James Harris).
+
+## 2.10.2
+* Fix Browserify support.
+
+## 2.10.1
+* Fix using Browserslist without `process` (by Andrew Patton).
+
+## 2.10
+* Add `< 1%` and `<= 1%` queries support (by August Kaiser).
+
+## 2.9.1
+* Fix unknown query on trailing spaces in query.
+
+## 2.9
+* Add `last Electron versions` and `last Electron major versions` queries
+  (by Louis Mouhat).
+
+## 2.8
+* Add `since 2016-03` and `since 2016-03-20` queries support (by Andrew Blick).
+
+## 2.7
+* Add `since 2016` queries support (by Igor Deryabin).
+
+## 2.6.1
+* Fix `Path must be a string` error.
+
+## 2.6
+* By default load config from current directory in CLI tool.
+
+## 2.5.1
+* Allow `@scope/browserlist-config` config name (by Jamie Connolly).
+
+## 2.5
+* Add `extends` query (by YellowKirby).
+
+## 2.4.1
+* Throw error if `package.json` contain `browserlist` instead of `browserslist`.
+
+## 2.4
+* Add `last n major versions` query (by John Sanders).
+
+## 2.3.3
+* Fix browsers support.
+
+## 2.3.2
+* Fix `> 0` query for browsers with one version (by Nikolay Solovyov).
+
+## 2.3.1
+* Reduce library size.
+
+## 2.3
+* Add `unreleased versions` and `unreleased Chrome versions` queries.
+
+## 2.2.2
+* Fix `Path must be a string` error (by Pieter Beulque).
+
+## 2.2.1
+* Fix security issue with regions dynamic `require`.
+
+## 2.2
+* Add region usage statistics support (by Clément P).
+
+## 2.1.5
+* Remove Firefox 45 from Firefox ESR.
+
+## 2.1.4
+* Use both ESR versions when they actual.
+
+## 2.1.3
+* Add warning on first exclude query.
+
+## 2.1.2
+* Fix non-Node.js environments support.
+
+## 2.1.1
+* Fix CLI arguments parsing.
+
+## 2.1
+* Add `>= 5%`, `>= 5% in US` and `>= 5% in my stats` queries.
+
+## 2.0 “Atelerix frontalis”
+* `last n versions` returns versions for all browsers, not only main browsers.
+* Cache file system operations (by Aarni Koskela).
+* Use `caniuse-lite` 1 MB instead of `caniuse-db` 7 MB (by Ben Briggs).
+* Add `.browserslistrc` config support.
+* Add QQ Browser for Android support.
+* Add tests for CLI (by Zhulduz Zhankenova).
+
+## 1.7.7
+* Update Firefox ESR.
+
+## 1.7.6
+* Fix Android Chrome selection.
+
+## 1.7.5
+* Fix combining `not` query with country based statistics.
+* Fix `--env` argument in CLI (by Tuure Savuoja).
+
+## 1.7.4
+* Speed up browser sorting (by Aarni Koskela).
+
+## 1.7.3
+* Fix config finding when directory was passed to `path` (by Aarni Koskela).
+
+## 1.7.2
+* Fix config finding algorithm (by Aarni Koskela).
+
+## 1.7.1
+* Fix unreleased browsers version detection.
+
+## 1.7
+* Add `--config` and `--env` arguments to CLI (by Jarek Rencz).
+
+## 1.6
+* Convert Electron version to Chrome (by Kilian Valkhof).
+* Fix `0` version mistake in Can I Use data.
+
+## 1.5.2
+* Fix browser versions ordering (by Marco Massarotto).
+
+## 1.5.1
+* Fix error on `package.json` and `browserslist` in same directory.
+
+## 1.5
+* Add `package.json` support (by Stepan Kuzmin).
+* Add environments support (by Maksim Semenov and openlibser).
+* Add `browserslist-stats.json` file support (by Oleh Aloshkin).
+* Add `config` option to CLI (by Evilebot Tnawi).
+* Add JSDoc.
+* Fix tests on Windows (by Anna Stoliar).
+* Don’t set custom usage statistics globally.
+
+## 1.4
+* Add `defaults` keyword.
+
+## 1.3.6
+* Add `UCAndroid` alias to `and_uc` (by Evilebot Tnawi).
+
+## 1.3.5
+* Fix Opera Mini support. Use `op_mini all`.
+
+## 1.3.4
+* Add space-less `>1%` and `>.5%` syntax support (by Andreas Lind).
+
+## 1.3.3
+* Clean `0` versions in some country-based requests.
+
+## 1.3.2
+* Update Firefox ESR.
+
+## 1.3.1
+* Add Safari TP support.
+
+## 1.3
+* Add coverage for specific country (by Joshua Wise).
+
+## 1.2
+* Add `browserslist.coverage()` method.
+* Add `--coverage` and `-c` argument to CLI.
+* Add `-v` argument support to CLI.
+* Better error handling in CLI.
+
+## 1.1.3
+* Fix jspm support (by Sean Anderson).
+
+## 1.1.2
+* Fix jspm support (by Sean Anderson).
+
+## 1.1.1
+* Fix space-less `>10%` and `>10% in my stats` queries.
+* Normalize error messages.
+* Remove development files from npm package.
+
+## 1.1
+* Added query against custom browser usage data (by Daniel Rey).
+
+## 1.0.1
+* Update Firefox ESR (by Rouven Weßling).
+
+## 1.0 “Atelerix algirus”
+* Remove Opera 12.1 from default query.
+* Add `not` keyword and exclude browsers by query.
+* Add Microsoft Edge support (by Andrey Polischuk).
+* Add CLI for debug and non-JS usage (by Luke Horvat).
+* Use own class in Browserslist errors.
+
+## 0.5
+* Add version ranges `IE 6-9` (by Ben Briggs).
+
+## 0.4
+* Add `config` option and `BROWSERSLIST_CONFIG` environment variable support.
+* Add symlink config support.
+
+## 0.3.3
+* Fix DynJS compatibility (by Nick Howes).
+
+## 0.3.2
+* Fix joined versions on versions query (by Vincent De Oliveira).
+
+## 0.3.1
+* Fix global variable leak (by Peter Müller).
+
+## 0.3
+* Takes queries from `BROWSERSLIST` environment variable.
+
+## 0.2
+* Return Can I Use joined versions as `ios_saf 7.0-7.1`.
+
+## 0.1.3
+* Better work with Can I Use joined versions like `ios_saf 7.0-7.1`.
+* Browserslist now understands `ios_saf 7.0` or `ios_saf 7`.
+
+## 0.1.2
+* Do not create global `browserslist` var (by Maxime Thirouin).
+
+## 0.1.1
+* Sort browsers by name and version.
+
+## 0.1 “Atelerix albiventris”
+* Initial release.
diff --git a/node_modules/browserslist/LICENSE b/node_modules/browserslist/LICENSE
new file mode 100644
index 0000000..1ae47a2
--- /dev/null
+++ b/node_modules/browserslist/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright 2014 Andrey Sitnik <andrey@sitnik.ru>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/browserslist/README.md b/node_modules/browserslist/README.md
new file mode 100644
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--- /dev/null
+++ b/node_modules/browserslist/README.md
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+# Browserslist [![Cult Of Martians][cult-img]][cult]
+
+<img width="120" height="120" alt="Browserslist logo by Anton Lovchikov"
+     src="https://browserslist.github.io/browserslist/logo.svg" align="right">
+
+The config to share target browsers and Node.js versions between different
+front-end tools. It is used in:
+
+* [Autoprefixer]
+* [Babel]
+* [postcss-preset-env]
+* [eslint-plugin-compat]
+* [stylelint-no-unsupported-browser-features]
+* [postcss-normalize]
+* [obsolete-webpack-plugin]
+
+All tools will find target browsers automatically,
+when you add the following to `package.json`:
+
+```js
+  "browserslist": [
+    "last 1 version",
+    "> 1%",
+    "maintained node versions",
+    "not dead"
+  ]
+```
+
+Or in `.browserslistrc` config:
+
+```yaml
+# Browsers that we support
+
+last 1 version
+> 1%
+maintained node versions
+not dead
+```
+
+Developers set versions list in queries like `last 2 version`
+to be free from updating versions manually.
+Browserslist will use [Can I Use] data for this queries.
+
+Browserslist will take queries from tool option,
+`browserslist` config, `.browserslistrc` config,
+`browserslist` section in `package.json` or environment variables.
+
+[Browserslist Example] shows how every tool uses Browserslist.
+
+[cult-img]: https://cultofmartians.com/assets/badges/badge.svg
+[cult]: https://cultofmartians.com/done.html
+
+<a href="https://evilmartians.com/?utm_source=browserslist">
+  <img src="https://evilmartians.com/badges/sponsored-by-evil-martians.svg"
+       alt="Sponsored by Evil Martians" width="236" height="54">
+</a>
+
+[stylelint-no-unsupported-browser-features]: https://github.com/ismay/stylelint-no-unsupported-browser-features
+[eslint-plugin-compat]:                      https://github.com/amilajack/eslint-plugin-compat
+[Browserslist Example]:                      https://github.com/browserslist/browserslist-example
+[postcss-preset-env]:                        https://github.com/jonathantneal/postcss-preset-env
+[postcss-normalize]:                         https://github.com/jonathantneal/postcss-normalize
+[Autoprefixer]:                              https://github.com/postcss/autoprefixer
+[Can I Use]:                                 https://caniuse.com/
+[Babel]:                                     https://github.com/babel/babel/tree/master/packages/babel-preset-env
+[obsolete-webpack-plugin]:                   https://github.com/ElemeFE/obsolete-webpack-plugin
+
+## Table of Contents
+
+1. [Tools](#tools)
+2. [Best Practices](#best-practices)
+3. [Queries](#queries)
+4. [Config File](#config-file)
+5. [Shareable Configs](#shareable-configs)
+6. [Configuring for Different Environments](#configuring-for-different-environments)
+7. [Custom Usage Data](#custom-usage-data)
+8. [JS API](#js-api)
+9. [Environment Variables](#environment-variables)
+10. [Cache](#cache)
+
+## Tools
+
+* [`browserslist-ga`] and [`browserslist-ga-export`] download your website
+  browsers statistics to use it in `> 0.5% in my stats` query.
+* [`browserslist-useragent-regexp`] compiles Browserslist query to a RegExp
+  to test browser useragent.
+* [`browserslist-useragent-ruby`] is a Ruby library to checks browser
+  by user agent string to match Browserslist.
+* [`browserslist-browserstack`] runs BrowserStack tests for all browsers
+  in Browserslist config.
+* [`caniuse-api`] returns browsers which support some specific feature.
+* Run `npx browserslist` in your project directory to see project’s
+  target browsers. This CLI tool is built-in and available in any project
+  with Autoprefixer.
+
+[`browserslist-useragent-regexp`]: https://github.com/browserslist/browserslist-useragent-regexp
+[`browserslist-useragent-ruby`]:   https://github.com/browserslist/browserslist-useragent-ruby
+[`browserslist-browserstack`]:     https://github.com/xeroxinteractive/browserslist-browserstack
+[`browserslist-ga-export`]:        https://github.com/browserslist/browserslist-ga-export
+[`browserslist-useragent`]:        https://github.com/pastelsky/browserslist-useragent
+[`browserslist-ga`]:               https://github.com/browserslist/browserslist-ga
+[`caniuse-api`]:                   https://github.com/Nyalab/caniuse-api
+
+
+## Best Practices
+
+* Select browsers directly (`last 2 Chrome versions`) only if you are making
+  a web app for a kiosk with one browser. There are a lot of browsers
+  on the market. If you are making general web app you should respect
+  browsers diversity.
+* There is a `defaults` query, which gives a reasonable configuration
+  for most users:
+
+  ```json
+    "browserslist": [
+      "defaults"
+    ]
+  ```
+
+* If you want to change the default set of browsers we recommend to combine
+  `last 1 version`, `not dead` with `> 0.2%` (or `> 1% in US`,
+  `> 1% in my stats`). `last n versions` adds too many dead browsers
+  and does not add popular old versions. Choosing a percentage above `0.2%`
+  will in the long run make popular browsers even more popular. We might run
+  into a monopoly and stagnation situation, as we had with Internet Explorer 6.
+  Please use this setting with caution.
+* Don’t remove browsers just because you don’t know them. Opera Mini has
+  100 million users in Africa and it is more popular in the global market
+  than Microsoft Edge. Chinese QQ Browsers has more market share than Firefox
+  and desktop Safari combined.
+
+
+## Queries
+
+Browserslist will use browsers and Node.js versions query
+from one of these sources:
+
+1. `browserslist` key in `package.json` file in current or parent directories.
+   **We recommend this way.**
+2. `.browserslistrc` config file in current or parent directories.
+3. `browserslist` config file in current or parent directories.
+4. `BROWSERSLIST` environment variable.
+5. If the above methods did not produce a valid result
+   Browserslist will use defaults:
+   `> 0.5%, last 2 versions, Firefox ESR, not dead`.
+
+
+### Query Composition
+
+An `or` combiner can use the keyword `or` as well as `,`.
+`last 1 version or > 1%` is equal to `last 1 version, > 1%`.
+
+`and` query combinations are also supported to perform an
+intersection of the previous query: `last 1 version and > 1%`.
+
+There is 3 different ways to combine queries as depicted below. First you start
+with a single query and then we combine the queries to get our final list.
+
+Obviously you can *not* start with a `not` combiner, since there is no left-hand
+side query to combine it with.
+
+| Query combiner type | Illustration | Example |
+| ------------------- | :----------: | ------- |
+|`or`/`,` combiner <br> (union) | ![Union of queries](img/union.svg)  | `> .5% or last 2 versions` <br> `> .5%, last 2 versions` |
+| `and` combiner <br> (intersection) | ![intersection of queries](img/intersection.svg) | `> .5% and last 2 versions` |
+| `not` combiner <br> (relative complement) | ![Relative complement of queries](img/complement.svg) | `> .5% and not last 2 versions` <br> `> .5% or not last 2 versions` <br> `> .5%, not last 2 versions` |
+
+_A quick way to test your query is to do `npx browserslist '> 0.5%, not IE 11'`
+in your terminal._
+
+
+### Full List
+
+You can specify the browser and Node.js versions by queries (case insensitive):
+
+* `> 5%`: browsers versions selected by global usage statistics.
+  `>=`, `<` and `<=` work too.
+* `> 5% in US`: uses USA usage statistics. It accepts [two-letter country code].
+* `> 5% in alt-AS`: uses Asia region usage statistics. List of all region codes
+  can be found at [`caniuse-lite/data/regions`].
+* `> 5% in my stats`: uses [custom usage data].
+* `cover 99.5%`: most popular browsers that provide coverage.
+* `cover 99.5% in US`: same as above, with [two-letter country code].
+* `cover 99.5% in my stats`: uses [custom usage data].
+* `maintained node versions`: all Node.js versions, which are [still maintained]
+  by Node.js Foundation.
+* `node 10` and `node 10.4`: selects latest Node.js `10.x.x`
+  or `10.4.x` release.
+* `current node`: Node.js version used by Browserslist right now.
+* `extends browserslist-config-mycompany`: take queries from
+  `browserslist-config-mycompany` npm package.
+* `ie 6-8`: selects an inclusive range of versions.
+* `Firefox > 20`: versions of Firefox newer than 20.
+  `>=`, `<` and `<=` work too. It also works with Node.js.
+* `iOS 7`: the iOS browser version 7 directly.
+* `Firefox ESR`: the latest [Firefox ESR] version.
+* `PhantomJS 2.1` and `PhantomJS 1.9`: selects Safari versions similar
+  to PhantomJS runtime.
+* `unreleased versions` or `unreleased Chrome versions`:
+  alpha and beta versions.
+* `last 2 major versions` or `last 2 iOS major versions`:
+  all minor/patch releases of last 2 major versions.
+* `since 2015` or `last 2 years`: all versions released since year 2015
+  (also `since 2015-03` and `since 2015-03-10`).
+* `dead`: browsers without official support or updates for 24 months.
+  Right now it is `IE 10`, `IE_Mob 10`, `BlackBerry 10`, `BlackBerry 7`,
+  `Samsung 4` and `OperaMobile 12.1`.
+* `last 2 versions`: the last 2 versions for *each* browser.
+* `last 2 Chrome versions`: the last 2 versions of Chrome browser.
+* `defaults`: Browserslist’s default browsers
+  (`> 0.5%, last 2 versions, Firefox ESR, not dead`).
+* `not ie <= 8`: exclude browsers selected by previous queries.
+
+You can add `not ` to any query.
+
+[`caniuse-lite/data/regions`]: https://github.com/ben-eb/caniuse-lite/tree/master/data/regions
+[two-letter country code]:     https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements
+[custom usage data]:           #custom-usage-data
+[still maintained]:            https://github.com/nodejs/Release
+[Can I Use]:                   https://caniuse.com/
+
+
+### Debug
+
+Run `npx browserslist` in project directory to see what browsers was selected
+by your queries.
+
+```sh
+$ npx browserslist
+and_chr 61
+and_ff 56
+and_qq 1.2
+and_uc 11.4
+android 56
+baidu 7.12
+bb 10
+chrome 62
+edge 16
+firefox 56
+ios_saf 11
+opera 48
+safari 11
+samsung 5
+```
+
+
+### Browsers
+
+Names are case insensitive:
+
+* `Android` for Android WebView.
+* `Baidu` for Baidu Browser.
+* `BlackBerry` or `bb` for Blackberry browser.
+* `Chrome` for Google Chrome.
+* `ChromeAndroid` or `and_chr` for Chrome for Android
+* `Edge` for Microsoft Edge.
+* `Electron` for Electron framework. It will be converted to Chrome version.
+* `Explorer` or `ie` for Internet Explorer.
+* `ExplorerMobile` or `ie_mob` for Internet Explorer Mobile.
+* `Firefox` or `ff` for Mozilla Firefox.
+* `FirefoxAndroid` or `and_ff` for Firefox for Android.
+* `iOS` or `ios_saf` for iOS Safari.
+* `Node` for Node.js.
+* `Opera` for Opera.
+* `OperaMini` or `op_mini` for Opera Mini.
+* `OperaMobile` or `op_mob` for Opera Mobile.
+* `QQAndroid` or `and_qq` for QQ Browser for Android.
+* `Safari` for desktop Safari.
+* `Samsung` for Samsung Internet.
+* `UCAndroid` or `and_uc` for UC Browser for Android.
+* `kaios` for KaiOS Browser.
+
+
+## Config File
+
+### `package.json`
+
+If you want to reduce config files in project root, you can specify
+browsers in `package.json` with `browserslist` key:
+
+```json
+{
+  "private": true,
+  "dependencies": {
+    "autoprefixer": "^6.5.4"
+  },
+  "browserslist": [
+    "last 1 version",
+    "> 1%",
+    "IE 10"
+  ]
+}
+```
+
+
+### `.browserslistrc`
+
+Separated Browserslist config should be named `.browserslistrc`
+and have browsers queries split by a new line. Comments starts with `#` symbol:
+
+```yaml
+# Browsers that we support
+
+last 1 version
+> 1%
+IE 10 # sorry
+```
+
+Browserslist will check config in every directory in `path`.
+So, if tool process `app/styles/main.css`, you can put config to root,
+`app/` or `app/styles`.
+
+You can specify direct path in `BROWSERSLIST_CONFIG` environment variables.
+
+
+## Shareable Configs
+
+You can use the following query to reference an exported Browserslist config
+from another package:
+
+```json
+  "browserslist": [
+    "extends browserslist-config-mycompany"
+  ]
+```
+
+For security reasons, external configuration only supports packages that have
+the `browserslist-config-` prefix. npm scoped packages are also supported, by
+naming or prefixing the module with `@scope/browserslist-config`, such as
+`@scope/browserslist-config` or `@scope/browserslist-config-mycompany`.
+
+If you don’t accept Browserslist queries from users, you can disable the
+validation by using the `dangerousExtend` option:
+
+```js
+browserslist(queries, { path, dangerousExtend: true })
+```
+
+Because this uses `npm`'s resolution, you can also reference specific files
+in a package:
+
+```json
+  "browserslist": [
+    "extends browserslist-config-mycompany/desktop",
+    "extends browserslist-config-mycompany/mobile"
+  ]
+```
+
+When writing a shared Browserslist package, just export an array.
+`browserslist-config-mycompany/index.js`:
+
+```js
+module.exports = [
+  'last 1 version',
+  '> 1%',
+  'ie 10'
+]
+```
+
+
+## Configuring for Different Environments
+
+You can also specify different browser queries for various environments.
+Browserslist will choose query according to `BROWSERSLIST_ENV` or `NODE_ENV`
+variables. If none of them is declared, Browserslist will firstly look
+for `production` queries and then use defaults.
+
+In `package.json`:
+
+```js
+  "browserslist": {
+    "production": [
+      "> 1%",
+      "ie 10"
+    ],
+    "modern": [
+      "last 1 chrome version",
+      "last 1 firefox version"
+    ],
+    "ssr": [
+      "node 12"
+    ]
+  }
+```
+
+In `.browserslistrc` config:
+
+```ini
+[production]
+> 1%
+ie 10
+
+[modern]
+last 1 chrome version
+last 1 firefox version
+
+[ssr]
+node 12
+```
+
+
+## Custom Usage Data
+
+If you have a website, you can query against the usage statistics of your site.
+[`browserslist-ga`] will ask access to Google Analytics and then generate
+`browserslist-stats.json`:
+
+```
+npx browserslist-ga
+```
+
+Or you can use [`browserslist-ga-export`] to convert Google Analytics data without giving a password for Google account.
+
+You can generate usage statistics file by any other method. File format should
+be like:
+
+```js
+{
+  "ie": {
+    "6": 0.01,
+    "7": 0.4,
+    "8": 1.5
+  },
+  "chrome": {
+    …
+  },
+  …
+}
+```
+
+Note that you can query against your custom usage data while also querying
+against global or regional data. For example, the query
+`> 1% in my stats, > 5% in US, 10%` is permitted.
+
+[`browserslist-ga-export`]: https://github.com/browserslist/browserslist-ga-export
+[`browserslist-ga`]:        https://github.com/browserslist/browserslist-ga
+[Can I Use]:                https://caniuse.com/
+
+
+## JS API
+
+```js
+const browserslist = require('browserslist')
+
+// Your CSS/JS build tool code
+function process (source, opts) {
+  const browsers = browserslist(opts.overrideBrowserslist, {
+    stats: opts.stats,
+    path:  opts.file,
+    env:   opts.env
+  })
+  // Your code to add features for selected browsers
+}
+```
+
+Queries can be a string `"> 1%, IE 10"`
+or an array `['> 1%', 'IE 10']`.
+
+If a query is missing, Browserslist will look for a config file.
+You can provide a `path` option (that can be a file) to find the config file
+relatively to it.
+
+Options:
+
+* `path`: file or a directory path to look for config file. Default is `.`.
+* `env`: what environment section use from config. Default is `production`.
+* `stats`: custom usage statistics data.
+* `config`: path to config if you want to set it manually.
+* `ignoreUnknownVersions`: do not throw on direct query (like `ie 12`).
+  Default is `false.`
+* `dangerousExtend`: Disable security checks for `extend` query.
+  Default is `false.`
+* `mobileToDesktop`: Use desktop browsers if Can I Use doesn’t have data
+  about this mobile version. For instance, Browserslist will return
+  `chrome 20` on `and_chr 20` query (Can I Use has only data only about
+  latest versions of mobile browsers). Default is `false`.
+
+For non-JS environment and debug purpose you can use CLI tool:
+
+```sh
+browserslist "> 1%, IE 10"
+```
+
+You can get total users coverage for selected browsers by JS API:
+
+```js
+browserslist.coverage(browserslist('> 1%'))
+//=> 81.4
+```
+
+```js
+browserslist.coverage(browserslist('> 1% in US'), 'US')
+//=> 83.1
+```
+
+```js
+browserslist.coverage(browserslist('> 1% in my stats'), 'my stats')
+//=> 83.1
+```
+
+```js
+browserslist.coverage(browserslist('> 1% in my stats', { stats }), stats)
+//=> 82.2
+```
+
+Or by CLI:
+
+```sh
+$ browserslist --coverage "> 1%"
+These browsers account for 81.4% of all users globally
+```
+
+```sh
+$ browserslist --coverage=US "> 1% in US"
+These browsers account for 83.1% of all users in the US
+```
+
+```sh
+$ browserslist --coverage "> 1% in my stats"
+These browsers account for 83.1% of all users in custom statistics
+```
+
+```sh
+$ browserslist --coverage "> 1% in my stats" --stats=./stats.json
+These browsers account for 83.1% of all users in custom statistics
+```
+
+
+## Environment Variables
+
+If some tool use Browserslist inside, you can change browsers settings
+by [environment variables]:
+
+* `BROWSERSLIST` with browsers queries.
+
+   ```sh
+  BROWSERSLIST="> 5%" gulp css
+   ```
+
+* `BROWSERSLIST_CONFIG` with path to config file.
+
+   ```sh
+  BROWSERSLIST_CONFIG=./config/browserslist gulp css
+   ```
+
+* `BROWSERSLIST_ENV` with environments string.
+
+   ```sh
+  BROWSERSLIST_ENV="development" gulp css
+   ```
+
+* `BROWSERSLIST_STATS` with path to the custom usage data
+  for `> 1% in my stats` query.
+
+   ```sh
+  BROWSERSLIST_STATS=./config/usage_data.json gulp css
+   ```
+
+* `BROWSERSLIST_DISABLE_CACHE` if you want to disable config reading cache.
+
+   ```sh
+  BROWSERSLIST_DISABLE_CACHE=1 gulp css
+   ```
+
+[environment variables]: https://en.wikipedia.org/wiki/Environment_variable
+
+
+## Cache
+
+Browserslist caches the configuration it reads from `package.json` and
+`browserslist` files, as well as knowledge about the existence of files,
+for the duration of the hosting process.
+
+To clear these caches, use:
+
+```js
+browserslist.clearCaches()
+```
+
+To disable the caching altogether, set the `BROWSERSLIST_DISABLE_CACHE`
+environment variable.
+
+
+## Security Contact
+
+To report a security vulnerability, please use the [Tidelift security contact].
+Tidelift will coordinate the fix and disclosure.
+
+[Tidelift security contact]: https://tidelift.com/security
diff --git a/node_modules/browserslist/browser.js b/node_modules/browserslist/browser.js
new file mode 100644
index 0000000..77a217a
--- /dev/null
+++ b/node_modules/browserslist/browser.js
@@ -0,0 +1,41 @@
+var BrowserslistError = require('./error')
+
+function noop () { }
+
+module.exports = {
+  loadQueries: function loadQueries () {
+    throw new BrowserslistError(
+      'Sharable configs are not supported in client-side build of Browserslist')
+  },
+
+  getStat: function getStat (opts) {
+    return opts.stats
+  },
+
+  loadConfig: function loadConfig (opts) {
+    if (opts.config) {
+      throw new BrowserslistError(
+        'Browserslist config are not supported in client-side build')
+    }
+  },
+
+  loadCountry: function loadCountry () {
+    throw new BrowserslistError(
+      'Country statistics is not supported ' +
+      'in client-side build of Browserslist')
+  },
+
+  currentNode: function currentNode (resolve, context) {
+    return resolve(['maintained node versions'], context)[0]
+  },
+
+  parseConfig: noop,
+
+  readConfig: noop,
+
+  findConfig: noop,
+
+  clearCaches: noop,
+
+  oldDataWarning: noop
+}
diff --git a/node_modules/browserslist/cli.js b/node_modules/browserslist/cli.js
new file mode 100755
index 0000000..d58f9c8
--- /dev/null
+++ b/node_modules/browserslist/cli.js
@@ -0,0 +1,135 @@
+#!/usr/bin/env node
+
+var fs = require('fs')
+
+var browserslist = require('./')
+var pkg = require('./package.json')
+var args = process.argv.slice(2)
+
+var USAGE = 'Usage:\n' +
+            '  ' + pkg.name + '\n' +
+            '  ' + pkg.name + ' "QUERIES"\n' +
+            '  ' + pkg.name + ' --json "QUERIES"\n' +
+            '  ' + pkg.name + ' --config="path/to/browserlist/file"\n' +
+            '  ' + pkg.name + ' --coverage "QUERIES"\n' +
+            '  ' + pkg.name + ' --coverage=US "QUERIES"\n' +
+            '  ' + pkg.name + ' --coverage=US,RU,global "QUERIES"\n' +
+            '  ' + pkg.name + ' --env="environment name defined in config"\n' +
+            '  ' + pkg.name + ' --stats="path/to/browserlist/stats/file"'
+
+function isArg (arg) {
+  return args.some(function (str) {
+    return str === arg || str.indexOf(arg + '=') === 0
+  })
+}
+
+function error (msg) {
+  process.stderr.write(pkg.name + ': ' + msg + '\n')
+  process.exit(1)
+}
+
+if (isArg('--help') || isArg('-h')) {
+  process.stdout.write(pkg.description + '.\n\n' + USAGE + '\n')
+} else if (isArg('--version') || isArg('-v')) {
+  process.stdout.write(pkg.name + ' ' + pkg.version + '\n')
+} else {
+  var mode = 'browsers'
+  var opts = { }
+  var queries
+  var areas
+
+  for (var i = 0; i < args.length; i++) {
+    if (args[i][0] !== '-') {
+      queries = args[i].replace(/^["']|["']$/g, '')
+      continue
+    }
+
+    var arg = args[i].split('=')
+    var name = arg[0]
+    var value = arg[1]
+
+    if (value) value = value.replace(/^["']|["']$/g, '')
+
+    if (name === '--config' || name === '-b') {
+      opts.config = value
+    } else if (name === '--env' || name === '-e') {
+      opts.env = value
+    } else if (name === '--stats' || name === '-s') {
+      opts.stats = value
+    } else if (name === '--coverage' || name === '-c') {
+      if (mode !== 'json') mode = 'coverage'
+      if (value) {
+        areas = value.split(',')
+      } else {
+        areas = ['global']
+      }
+    } else if (name === '--json') {
+      mode = 'json'
+    } else {
+      error('Unknown arguments ' + args[i] + '.\n\n' + USAGE)
+    }
+  }
+
+  var browsers
+  try {
+    browsers = browserslist(queries, opts)
+  } catch (e) {
+    if (e.name === 'BrowserslistError') {
+      error(e.message)
+    } else {
+      throw e
+    }
+  }
+
+  var coverage
+  if (mode === 'browsers') {
+    browsers.forEach(function (browser) {
+      process.stdout.write(browser + '\n')
+    })
+  } else if (areas) {
+    coverage = areas.map(function (area) {
+      var stats
+      if (area !== 'global') {
+        stats = area
+      } else if (opts.stats) {
+        stats = JSON.parse(fs.readFileSync(opts.stats))
+      }
+      var result = browserslist.coverage(browsers, stats)
+      var round = Math.round(result * 100) / 100.0
+
+      return [area, round]
+    })
+
+    if (mode === 'coverage') {
+      var prefix = 'These browsers account for '
+      process.stdout.write(prefix)
+      coverage.forEach(function (data, index) {
+        var area = data[0]
+        var round = data[1]
+        var end = 'globally'
+        if (area && area !== 'global') {
+          end = 'in the ' + area.toUpperCase()
+        } else if (opts.stats) {
+          end = 'in custom statistics'
+        }
+
+        if (index !== 0) {
+          process.stdout.write(prefix.replace(/./g, ' '))
+        }
+
+        process.stdout.write(round + '% of all users ' + end + '\n')
+      })
+    }
+  }
+
+  if (mode === 'json') {
+    var data = { browsers: browsers }
+    if (coverage) {
+      data.coverage = coverage.reduce(function (object, j) {
+        object[j[0]] = j[1]
+        return object
+      }, { })
+    }
+    process.stdout.write(JSON.stringify(data, null, '  ') + '\n')
+  }
+}
diff --git a/node_modules/browserslist/error.js b/node_modules/browserslist/error.js
new file mode 100644
index 0000000..b3bc0fe
--- /dev/null
+++ b/node_modules/browserslist/error.js
@@ -0,0 +1,12 @@
+function BrowserslistError (message) {
+  this.name = 'BrowserslistError'
+  this.message = message
+  this.browserslist = true
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, BrowserslistError)
+  }
+}
+
+BrowserslistError.prototype = Error.prototype
+
+module.exports = BrowserslistError
diff --git a/node_modules/browserslist/index.js b/node_modules/browserslist/index.js
new file mode 100644
index 0000000..dd4dfea
--- /dev/null
+++ b/node_modules/browserslist/index.js
@@ -0,0 +1,996 @@
+var jsReleases = require('node-releases/data/processed/envs.json')
+var agents = require('caniuse-lite/dist/unpacker/agents').agents
+var jsEOL = require('node-releases/data/release-schedule/release-schedule.json')
+var path = require('path')
+var e2c = require('electron-to-chromium/versions')
+
+var BrowserslistError = require('./error')
+var env = require('./node') // Will load browser.js in webpack
+
+var FLOAT_RANGE = /^\d+(\.\d+)?(-\d+(\.\d+)?)*$/
+var YEAR = 365.259641 * 24 * 60 * 60 * 1000
+
+var QUERY_OR = 1
+var QUERY_AND = 2
+
+function isVersionsMatch (versionA, versionB) {
+  return (versionA + '.').indexOf(versionB + '.') === 0
+}
+
+function isEolReleased (name) {
+  var version = name.slice(1)
+  return jsReleases.some(function (i) {
+    return isVersionsMatch(i.version, version)
+  })
+}
+
+function normalize (versions) {
+  return versions.filter(function (version) {
+    return typeof version === 'string'
+  })
+}
+
+function normalizeElectron (version) {
+  var versionToUse = version
+  if (version.split('.').length === 3) {
+    versionToUse = version
+      .split('.')
+      .slice(0, -1)
+      .join('.')
+  }
+  return versionToUse
+}
+
+function nameMapper (name) {
+  return function mapName (version) {
+    return name + ' ' + version
+  }
+}
+
+function getMajor (version) {
+  return parseInt(version.split('.')[0])
+}
+
+function getMajorVersions (released, number) {
+  if (released.length === 0) return []
+  var minimum = getMajor(released[released.length - 1]) - parseInt(number) + 1
+  var selected = []
+  for (var i = released.length - 1; i >= 0; i--) {
+    if (minimum > getMajor(released[i])) break
+    selected.unshift(released[i])
+  }
+  return selected
+}
+
+function uniq (array) {
+  var filtered = []
+  for (var i = 0; i < array.length; i++) {
+    if (filtered.indexOf(array[i]) === -1) filtered.push(array[i])
+  }
+  return filtered
+}
+
+// Helpers
+
+function fillUsage (result, name, data) {
+  for (var i in data) {
+    result[name + ' ' + i] = data[i]
+  }
+}
+
+function generateFilter (sign, version) {
+  version = parseFloat(version)
+  if (sign === '>') {
+    return function (v) {
+      return parseFloat(v) > version
+    }
+  } else if (sign === '>=') {
+    return function (v) {
+      return parseFloat(v) >= version
+    }
+  } else if (sign === '<') {
+    return function (v) {
+      return parseFloat(v) < version
+    }
+  } else {
+    return function (v) {
+      return parseFloat(v) <= version
+    }
+  }
+}
+
+function generateSemverFilter (sign, version) {
+  version = version.split('.').map(parseSimpleInt)
+  version[1] = version[1] || 0
+  version[2] = version[2] || 0
+  if (sign === '>') {
+    return function (v) {
+      v = v.split('.').map(parseSimpleInt)
+      return compareSemver(v, version) > 0
+    }
+  } else if (sign === '>=') {
+    return function (v) {
+      v = v.split('.').map(parseSimpleInt)
+      return compareSemver(v, version) >= 0
+    }
+  } else if (sign === '<') {
+    return function (v) {
+      v = v.split('.').map(parseSimpleInt)
+      return compareSemver(version, v) > 0
+    }
+  } else {
+    return function (v) {
+      v = v.split('.').map(parseSimpleInt)
+      return compareSemver(version, v) >= 0
+    }
+  }
+}
+
+function parseSimpleInt (x) {
+  return parseInt(x)
+}
+
+function compare (a, b) {
+  if (a < b) return -1
+  if (a > b) return +1
+  return 0
+}
+
+function compareSemver (a, b) {
+  return (
+    compare(a[0], b[0]) ||
+    compare(a[1], b[1]) ||
+    compare(a[2], b[2])
+  )
+}
+
+function resolveVersion (data, version) {
+  if (data.versions.indexOf(version) !== -1) {
+    return version
+  } else if (browserslist.versionAliases[data.name][version]) {
+    return browserslist.versionAliases[data.name][version]
+  } else {
+    return false
+  }
+}
+
+function normalizeVersion (data, version, context) {
+  var resolved = resolveVersion(data, version)
+  if (
+    !resolved &&
+    context.mobileToDesktop &&
+    browserslist.desktopNames[data.name]
+  ) {
+    var alias = checkName(browserslist.desktopNames[data.name])
+    resolved = resolveVersion(alias, version)
+  }
+  if (resolved) {
+    return resolved
+  } else if (data.versions.length === 1) {
+    return data.versions[0]
+  } else {
+    return false
+  }
+}
+
+function filterByYear (since) {
+  since = since / 1000
+  return Object.keys(agents).reduce(function (selected, name) {
+    var data = byName(name)
+    if (!data) return selected
+    var versions = Object.keys(data.releaseDate).filter(function (v) {
+      return data.releaseDate[v] >= since
+    })
+    return selected.concat(versions.map(nameMapper(data.name)))
+  }, [])
+}
+
+function byName (name) {
+  name = name.toLowerCase()
+  name = browserslist.aliases[name] || name
+  return browserslist.data[name]
+}
+
+function checkName (name) {
+  var data = byName(name)
+  if (!data) throw new BrowserslistError('Unknown browser ' + name)
+  return data
+}
+
+function unknownQuery (query) {
+  return new BrowserslistError(
+    'Unknown browser query `' + query + '`. ' +
+    'Maybe you are using old Browserslist or made typo in query.'
+  )
+}
+
+function filterAndroid (list, versions) {
+  var released = browserslist.data.android.released
+  var firstEvergreen = 37
+  var last = released[released.length - 1]
+  var diff = last - firstEvergreen - versions // First Android Evergreen
+  if (diff > 0) {
+    return list.slice(-1)
+  } else {
+    return list.slice(diff - 1)
+  }
+}
+
+/**
+ * Resolves queries into a browser list.
+ * @param {string|string[]} queries Queries to combine.
+ * Either an array of queries or a long string of queries.
+ * @param {object} [context] Optional arguments to
+ * the select function in `queries`.
+ * @returns {string[]} A list of browsers
+ */
+function resolve (queries, context) {
+  if (Array.isArray(queries)) {
+    queries = flatten(queries.map(parse))
+  } else {
+    queries = parse(queries)
+  }
+
+  return queries.reduce(function (result, query, index) {
+    var selection = query.queryString
+
+    var isExclude = selection.indexOf('not ') === 0
+    if (isExclude) {
+      if (index === 0) {
+        throw new BrowserslistError(
+          'Write any browsers query (for instance, `defaults`) ' +
+          'before `' + selection + '`')
+      }
+      selection = selection.slice(4)
+    }
+
+    for (var i = 0; i < QUERIES.length; i++) {
+      var type = QUERIES[i]
+      var match = selection.match(type.regexp)
+      if (match) {
+        var args = [context].concat(match.slice(1))
+        var array = type.select.apply(browserslist, args).map(function (j) {
+          var parts = j.split(' ')
+          if (parts[1] === '0') {
+            return parts[0] + ' ' + byName(parts[0]).versions[0]
+          } else {
+            return j
+          }
+        })
+
+        switch (query.type) {
+          case QUERY_AND:
+            if (isExclude) {
+              return result.filter(function (j) {
+                return array.indexOf(j) === -1
+              })
+            } else {
+              return result.filter(function (j) {
+                return array.indexOf(j) !== -1
+              })
+            }
+          case QUERY_OR:
+          default:
+            if (isExclude) {
+              var filter = { }
+              array.forEach(function (j) {
+                filter[j] = true
+              })
+              return result.filter(function (j) {
+                return !filter[j]
+              })
+            }
+            return result.concat(array)
+        }
+      }
+    }
+
+    throw unknownQuery(selection)
+  }, [])
+}
+
+/**
+ * Return array of browsers by selection queries.
+ *
+ * @param {(string|string[])} [queries=browserslist.defaults] Browser queries.
+ * @param {object} [opts] Options.
+ * @param {string} [opts.path="."] Path to processed file.
+ *                                 It will be used to find config files.
+ * @param {string} [opts.env="production"] Processing environment.
+ *                                         It will be used to take right
+ *                                         queries from config file.
+ * @param {string} [opts.config] Path to config file with queries.
+ * @param {object} [opts.stats] Custom browser usage statistics
+ *                              for "> 1% in my stats" query.
+ * @param {boolean} [opts.ignoreUnknownVersions=false] Do not throw on unknown
+ *                                                     version in direct query.
+ * @param {boolean} [opts.dangerousExtend] Disable security checks
+ *                                         for extend query.
+ * @param {boolean} [opts.mobileToDesktop] Alias mobile browsers to the desktop
+ *                                         version when Can I Use doesn't have
+ *                                         data about the specified version.
+ * @returns {string[]} Array with browser names in Can I Use.
+ *
+ * @example
+ * browserslist('IE >= 10, IE 8') //=> ['ie 11', 'ie 10', 'ie 8']
+ */
+function browserslist (queries, opts) {
+  if (typeof opts === 'undefined') opts = { }
+
+  if (typeof opts.path === 'undefined') {
+    opts.path = path.resolve ? path.resolve('.') : '.'
+  }
+
+  if (typeof queries === 'undefined' || queries === null) {
+    var config = browserslist.loadConfig(opts)
+    if (config) {
+      queries = config
+    } else {
+      queries = browserslist.defaults
+    }
+  }
+
+  if (!(typeof queries === 'string' || Array.isArray(queries))) {
+    throw new BrowserslistError(
+      'Browser queries must be an array or string. Got ' + typeof queries + '.')
+  }
+
+  var context = {
+    ignoreUnknownVersions: opts.ignoreUnknownVersions,
+    dangerousExtend: opts.dangerousExtend,
+    mobileToDesktop: opts.mobileToDesktop
+  }
+
+  env.oldDataWarning(browserslist.data)
+  var stats = env.getStat(opts, browserslist.data)
+  if (stats) {
+    context.customUsage = { }
+    for (var browser in stats) {
+      fillUsage(context.customUsage, browser, stats[browser])
+    }
+  }
+
+  var result = resolve(queries, context).sort(function (name1, name2) {
+    name1 = name1.split(' ')
+    name2 = name2.split(' ')
+    if (name1[0] === name2[0]) {
+      if (FLOAT_RANGE.test(name1[1]) && FLOAT_RANGE.test(name2[1])) {
+        return parseFloat(name2[1]) - parseFloat(name1[1])
+      } else {
+        return compare(name2[1], name1[1])
+      }
+    } else {
+      return compare(name1[0], name2[0])
+    }
+  })
+
+  return uniq(result)
+}
+
+function parse (queries) {
+  var qs = []
+  do {
+    queries = doMatch(queries, qs)
+  } while (queries)
+  return qs
+}
+
+function doMatch (string, qs) {
+  var or = /^(?:,\s*|\s+OR\s+)(.*)/i
+  var and = /^\s+AND\s+(.*)/i
+
+  return find(string, function (parsed, n, max) {
+    if (and.test(parsed)) {
+      qs.unshift({ type: QUERY_AND, queryString: parsed.match(and)[1] })
+      return true
+    } else if (or.test(parsed)) {
+      qs.unshift({ type: QUERY_OR, queryString: parsed.match(or)[1] })
+      return true
+    } else if (n === max) {
+      qs.unshift({ type: QUERY_OR, queryString: parsed.trim() })
+      return true
+    }
+    return false
+  })
+}
+
+function find (string, predicate) {
+  for (var n = 1, max = string.length; n <= max; n++) {
+    var parsed = string.substr(-n, n)
+    if (predicate(parsed, n, max)) {
+      return string.slice(0, -n)
+    }
+  }
+  return ''
+}
+
+function flatten (array) {
+  if (!Array.isArray(array)) return [array]
+  return array.reduce(function (a, b) {
+    return a.concat(flatten(b))
+  }, [])
+}
+
+// Will be filled by Can I Use data below
+browserslist.data = { }
+browserslist.usage = {
+  global: { },
+  custom: null
+}
+
+// Default browsers query
+browserslist.defaults = [
+  '> 0.5%',
+  'last 2 versions',
+  'Firefox ESR',
+  'not dead'
+]
+
+// Browser names aliases
+browserslist.aliases = {
+  fx: 'firefox',
+  ff: 'firefox',
+  ios: 'ios_saf',
+  explorer: 'ie',
+  blackberry: 'bb',
+  explorermobile: 'ie_mob',
+  operamini: 'op_mini',
+  operamobile: 'op_mob',
+  chromeandroid: 'and_chr',
+  firefoxandroid: 'and_ff',
+  ucandroid: 'and_uc',
+  qqandroid: 'and_qq'
+}
+
+// Can I Use only provides a few versions for some browsers (e.g. and_chr).
+// Fallback to a similar browser for unknown versions
+browserslist.desktopNames = {
+  and_chr: 'chrome',
+  and_ff: 'firefox',
+  ie_mob: 'ie',
+  op_mob: 'opera'
+}
+
+// Aliases to work with joined versions like `ios_saf 7.0-7.1`
+browserslist.versionAliases = { }
+
+browserslist.clearCaches = env.clearCaches
+browserslist.parseConfig = env.parseConfig
+browserslist.readConfig = env.readConfig
+browserslist.findConfig = env.findConfig
+browserslist.loadConfig = env.loadConfig
+
+/**
+ * Return browsers market coverage.
+ *
+ * @param {string[]} browsers Browsers names in Can I Use.
+ * @param {string|object} [stats="global"] Which statistics should be used.
+ *                                         Country code or custom statistics.
+ *                                         Pass `"my stats"` to load statistics
+ *                                         from Browserslist files.
+ *
+ * @return {number} Total market coverage for all selected browsers.
+ *
+ * @example
+ * browserslist.coverage(browserslist('> 1% in US'), 'US') //=> 83.1
+ */
+browserslist.coverage = function (browsers, stats) {
+  var data
+  if (typeof stats === 'undefined') {
+    data = browserslist.usage.global
+  } else if (stats === 'my stats') {
+    var opts = {}
+    opts.path = path.resolve ? path.resolve('.') : '.'
+    var customStats = env.getStat(opts)
+    if (!customStats) {
+      throw new BrowserslistError('Custom usage statistics was not provided')
+    }
+    data = {}
+    for (var browser in customStats) {
+      fillUsage(data, browser, customStats[browser])
+    }
+  } else if (typeof stats === 'string') {
+    if (stats.length > 2) {
+      stats = stats.toLowerCase()
+    } else {
+      stats = stats.toUpperCase()
+    }
+    env.loadCountry(browserslist.usage, stats)
+    data = browserslist.usage[stats]
+  } else {
+    if ('dataByBrowser' in stats) {
+      stats = stats.dataByBrowser
+    }
+    data = { }
+    for (var name in stats) {
+      for (var version in stats[name]) {
+        data[name + ' ' + version] = stats[name][version]
+      }
+    }
+  }
+
+  return browsers.reduce(function (all, i) {
+    var usage = data[i]
+    if (usage === undefined) {
+      usage = data[i.replace(/ \S+$/, ' 0')]
+    }
+    return all + (usage || 0)
+  }, 0)
+}
+
+var QUERIES = [
+  {
+    regexp: /^last\s+(\d+)\s+major\s+versions?$/i,
+    select: function (context, versions) {
+      return Object.keys(agents).reduce(function (selected, name) {
+        var data = byName(name)
+        if (!data) return selected
+        var list = getMajorVersions(data.released, versions)
+        list = list.map(nameMapper(data.name))
+        if (data.name === 'android') list = filterAndroid(list, versions)
+        return selected.concat(list)
+      }, [])
+    }
+  },
+  {
+    regexp: /^last\s+(\d+)\s+versions?$/i,
+    select: function (context, versions) {
+      return Object.keys(agents).reduce(function (selected, name) {
+        var data = byName(name)
+        if (!data) return selected
+        var list = data.released.slice(-versions)
+        list = list.map(nameMapper(data.name))
+        if (data.name === 'android') list = filterAndroid(list, versions)
+        return selected.concat(list)
+      }, [])
+    }
+  },
+  {
+    regexp: /^last\s+(\d+)\s+electron\s+major\s+versions?$/i,
+    select: function (context, versions) {
+      var validVersions = getMajorVersions(Object.keys(e2c).reverse(), versions)
+      return validVersions.map(function (i) {
+        return 'chrome ' + e2c[i]
+      })
+    }
+  },
+  {
+    regexp: /^last\s+(\d+)\s+(\w+)\s+major\s+versions?$/i,
+    select: function (context, versions, name) {
+      var data = checkName(name)
+      var validVersions = getMajorVersions(data.released, versions)
+      var list = validVersions.map(nameMapper(data.name))
+      if (data.name === 'android') list = filterAndroid(list, versions)
+      return list
+    }
+  },
+  {
+    regexp: /^last\s+(\d+)\s+electron\s+versions?$/i,
+    select: function (context, versions) {
+      return Object.keys(e2c).reverse().slice(-versions).map(function (i) {
+        return 'chrome ' + e2c[i]
+      })
+    }
+  },
+  {
+    regexp: /^last\s+(\d+)\s+(\w+)\s+versions?$/i,
+    select: function (context, versions, name) {
+      var data = checkName(name)
+      var list = data.released.slice(-versions).map(nameMapper(data.name))
+      if (data.name === 'android') list = filterAndroid(list, versions)
+      return list
+    }
+  },
+  {
+    regexp: /^unreleased\s+versions$/i,
+    select: function () {
+      return Object.keys(agents).reduce(function (selected, name) {
+        var data = byName(name)
+        if (!data) return selected
+        var list = data.versions.filter(function (v) {
+          return data.released.indexOf(v) === -1
+        })
+        list = list.map(nameMapper(data.name))
+        return selected.concat(list)
+      }, [])
+    }
+  },
+  {
+    regexp: /^unreleased\s+electron\s+versions?$/i,
+    select: function () {
+      return []
+    }
+  },
+  {
+    regexp: /^unreleased\s+(\w+)\s+versions?$/i,
+    select: function (context, name) {
+      var data = checkName(name)
+      return data.versions.filter(function (v) {
+        return data.released.indexOf(v) === -1
+      }).map(nameMapper(data.name))
+    }
+  },
+  {
+    regexp: /^last\s+(\d*.?\d+)\s+years?$/i,
+    select: function (context, years) {
+      return filterByYear(Date.now() - YEAR * years)
+    }
+  },
+  {
+    regexp: /^since (\d+)(?:-(\d+))?(?:-(\d+))?$/i,
+    select: function (context, year, month, date) {
+      year = parseInt(year)
+      month = parseInt(month || '01') - 1
+      date = parseInt(date || '01')
+      return filterByYear(Date.UTC(year, month, date, 0, 0, 0))
+    }
+  },
+  {
+    regexp: /^(>=?|<=?)\s*(\d*\.?\d+)%$/,
+    select: function (context, sign, popularity) {
+      popularity = parseFloat(popularity)
+      var usage = browserslist.usage.global
+      return Object.keys(usage).reduce(function (result, version) {
+        if (sign === '>') {
+          if (usage[version] > popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<') {
+          if (usage[version] < popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<=') {
+          if (usage[version] <= popularity) {
+            result.push(version)
+          }
+        } else if (usage[version] >= popularity) {
+          result.push(version)
+        }
+        return result
+      }, [])
+    }
+  },
+  {
+    regexp: /^(>=?|<=?)\s*(\d*\.?\d+)%\s+in\s+my\s+stats$/,
+    select: function (context, sign, popularity) {
+      popularity = parseFloat(popularity)
+      if (!context.customUsage) {
+        throw new BrowserslistError('Custom usage statistics was not provided')
+      }
+      var usage = context.customUsage
+      return Object.keys(usage).reduce(function (result, version) {
+        if (sign === '>') {
+          if (usage[version] > popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<') {
+          if (usage[version] < popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<=') {
+          if (usage[version] <= popularity) {
+            result.push(version)
+          }
+        } else if (usage[version] >= popularity) {
+          result.push(version)
+        }
+        return result
+      }, [])
+    }
+  },
+  {
+    regexp: /^(>=?|<=?)\s*(\d*\.?\d+)%\s+in\s+((alt-)?\w\w)$/,
+    select: function (context, sign, popularity, place) {
+      popularity = parseFloat(popularity)
+      if (place.length === 2) {
+        place = place.toUpperCase()
+      } else {
+        place = place.toLowerCase()
+      }
+      env.loadCountry(browserslist.usage, place)
+      var usage = browserslist.usage[place]
+      return Object.keys(usage).reduce(function (result, version) {
+        if (sign === '>') {
+          if (usage[version] > popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<') {
+          if (usage[version] < popularity) {
+            result.push(version)
+          }
+        } else if (sign === '<=') {
+          if (usage[version] <= popularity) {
+            result.push(version)
+          }
+        } else if (usage[version] >= popularity) {
+          result.push(version)
+        }
+        return result
+      }, [])
+    }
+  },
+  {
+    regexp: /^cover\s+(\d*\.?\d+)%(\s+in\s+(my\s+stats|(alt-)?\w\w))?$/,
+    select: function (context, coverage, statMode) {
+      coverage = parseFloat(coverage)
+      var usage = browserslist.usage.global
+      if (statMode) {
+        if (statMode.match(/^\s+in\s+my\s+stats$/)) {
+          if (!context.customUsage) {
+            throw new BrowserslistError(
+              'Custom usage statistics was not provided'
+            )
+          }
+          usage = context.customUsage
+        } else {
+          var match = statMode.match(/\s+in\s+((alt-)?\w\w)/)
+          var place = match[1]
+          if (place.length === 2) {
+            place = place.toUpperCase()
+          } else {
+            place = place.toLowerCase()
+          }
+          env.loadCountry(browserslist.usage, place)
+          usage = browserslist.usage[place]
+        }
+      }
+      var versions = Object.keys(usage).sort(function (a, b) {
+        return usage[b] - usage[a]
+      })
+      var coveraged = 0
+      var result = []
+      var version
+      for (var i = 0; i <= versions.length; i++) {
+        version = versions[i]
+        if (usage[version] === 0) break
+        coveraged += usage[version]
+        result.push(version)
+        if (coveraged >= coverage) break
+      }
+      return result
+    }
+  },
+  {
+    regexp: /^electron\s+([\d.]+)\s*-\s*([\d.]+)$/i,
+    select: function (context, from, to) {
+      var fromToUse = normalizeElectron(from)
+      var toToUse = normalizeElectron(to)
+      if (!e2c[fromToUse]) {
+        throw new BrowserslistError('Unknown version ' + from + ' of electron')
+      }
+      if (!e2c[toToUse]) {
+        throw new BrowserslistError('Unknown version ' + to + ' of electron')
+      }
+      from = parseFloat(from)
+      to = parseFloat(to)
+      return Object.keys(e2c).filter(function (i) {
+        var parsed = parseFloat(i)
+        return parsed >= from && parsed <= to
+      }).map(function (i) {
+        return 'chrome ' + e2c[i]
+      })
+    }
+  },
+  {
+    regexp: /^(\w+)\s+([\d.]+)\s*-\s*([\d.]+)$/i,
+    select: function (context, name, from, to) {
+      var data = checkName(name)
+      from = parseFloat(normalizeVersion(data, from, context) || from)
+      to = parseFloat(normalizeVersion(data, to, context) || to)
+      function filter (v) {
+        var parsed = parseFloat(v)
+        return parsed >= from && parsed <= to
+      }
+      return data.released.filter(filter).map(nameMapper(data.name))
+    }
+  },
+  {
+    regexp: /^electron\s*(>=?|<=?)\s*([\d.]+)$/i,
+    select: function (context, sign, version) {
+      var versionToUse = normalizeElectron(version)
+      return Object.keys(e2c)
+        .filter(generateFilter(sign, versionToUse))
+        .map(function (i) {
+          return 'chrome ' + e2c[i]
+        })
+    }
+  },
+  {
+    regexp: /^node\s*(>=?|<=?)\s*([\d.]+)$/i,
+    select: function (context, sign, version) {
+      var nodeVersions = jsReleases.filter(function (i) {
+        return i.name === 'nodejs'
+      }).map(function (i) {
+        return i.version
+      })
+      return nodeVersions
+        .filter(generateSemverFilter(sign, version))
+        .map(function (v) {
+          return 'node ' + v
+        })
+    }
+  },
+  {
+    regexp: /^(\w+)\s*(>=?|<=?)\s*([\d.]+)$/,
+    select: function (context, name, sign, version) {
+      var data = checkName(name)
+      var alias = browserslist.versionAliases[data.name][version]
+      if (alias) {
+        version = alias
+      }
+      return data.released
+        .filter(generateFilter(sign, version))
+        .map(function (v) {
+          return data.name + ' ' + v
+        })
+    }
+  },
+  {
+    regexp: /^(firefox|ff|fx)\s+esr$/i,
+    select: function () {
+      return ['firefox 68', 'firefox 60']
+    }
+  },
+  {
+    regexp: /(operamini|op_mini)\s+all/i,
+    select: function () {
+      return ['op_mini all']
+    }
+  },
+  {
+    regexp: /^electron\s+([\d.]+)$/i,
+    select: function (context, version) {
+      var versionToUse = normalizeElectron(version)
+      var chrome = e2c[versionToUse]
+      if (!chrome) {
+        throw new BrowserslistError(
+          'Unknown version ' + version + ' of electron')
+      }
+      return ['chrome ' + chrome]
+    }
+  },
+  {
+    regexp: /^node\s+(\d+(\.\d+)?(\.\d+)?)$/i,
+    select: function (context, version) {
+      var nodeReleases = jsReleases.filter(function (i) {
+        return i.name === 'nodejs'
+      })
+      var matched = nodeReleases.filter(function (i) {
+        return isVersionsMatch(i.version, version)
+      })
+      if (matched.length === 0) {
+        if (context.ignoreUnknownVersions) {
+          return []
+        } else {
+          throw new BrowserslistError(
+            'Unknown version ' + version + ' of Node.js')
+        }
+      }
+      return ['node ' + matched[matched.length - 1].version]
+    }
+  },
+  {
+    regexp: /^current\s+node$/i,
+    select: function (context) {
+      return [env.currentNode(resolve, context)]
+    }
+  },
+  {
+    regexp: /^maintained\s+node\s+versions$/i,
+    select: function (context) {
+      var now = Date.now()
+      var queries = Object.keys(jsEOL).filter(function (key) {
+        return now < Date.parse(jsEOL[key].end) &&
+          now > Date.parse(jsEOL[key].start) &&
+          isEolReleased(key)
+      }).map(function (key) {
+        return 'node ' + key.slice(1)
+      })
+      return resolve(queries, context)
+    }
+  },
+  {
+    regexp: /^phantomjs\s+1.9$/i,
+    select: function () {
+      return ['safari 5']
+    }
+  },
+  {
+    regexp: /^phantomjs\s+2.1$/i,
+    select: function () {
+      return ['safari 6']
+    }
+  },
+  {
+    regexp: /^(\w+)\s+(tp|[\d.]+)$/i,
+    select: function (context, name, version) {
+      if (/^tp$/i.test(version)) version = 'TP'
+      var data = checkName(name)
+      var alias = normalizeVersion(data, version, context)
+      if (alias) {
+        version = alias
+      } else {
+        if (version.indexOf('.') === -1) {
+          alias = version + '.0'
+        } else {
+          alias = version.replace(/\.0$/, '')
+        }
+        alias = normalizeVersion(data, alias, context)
+        if (alias) {
+          version = alias
+        } else if (context.ignoreUnknownVersions) {
+          return []
+        } else {
+          throw new BrowserslistError(
+            'Unknown version ' + version + ' of ' + name)
+        }
+      }
+      return [data.name + ' ' + version]
+    }
+  },
+  {
+    regexp: /^extends (.+)$/i,
+    select: function (context, name) {
+      return resolve(env.loadQueries(context, name), context)
+    }
+  },
+  {
+    regexp: /^defaults$/i,
+    select: function () {
+      return browserslist(browserslist.defaults)
+    }
+  },
+  {
+    regexp: /^dead$/i,
+    select: function (context) {
+      var dead = [
+        'ie <= 10', 'ie_mob <= 10',
+        'bb <= 10',
+        'op_mob <= 12.1',
+        'samsung 4'
+      ]
+      return resolve(dead, context)
+    }
+  },
+  {
+    regexp: /^(\w+)$/i,
+    select: function (context, name) {
+      if (byName(name)) {
+        throw new BrowserslistError(
+          'Specify versions in Browserslist query for browser ' + name)
+      } else {
+        throw unknownQuery(name)
+      }
+    }
+  }
+];
+
+// Get and convert Can I Use data
+
+(function () {
+  for (var name in agents) {
+    var browser = agents[name]
+    browserslist.data[name] = {
+      name: name,
+      versions: normalize(agents[name].versions),
+      released: normalize(agents[name].versions.slice(0, -3)),
+      releaseDate: agents[name].release_date
+    }
+    fillUsage(browserslist.usage.global, name, browser.usage_global)
+
+    browserslist.versionAliases[name] = { }
+    for (var i = 0; i < browser.versions.length; i++) {
+      var full = browser.versions[i]
+      if (!full) continue
+
+      if (full.indexOf('-') !== -1) {
+        var interval = full.split('-')
+        for (var j = 0; j < interval.length; j++) {
+          browserslist.versionAliases[name][interval[j]] = full
+        }
+      }
+    }
+  }
+}())
+
+module.exports = browserslist
diff --git a/node_modules/browserslist/node.js b/node_modules/browserslist/node.js
new file mode 100644
index 0000000..d080075
--- /dev/null
+++ b/node_modules/browserslist/node.js
@@ -0,0 +1,318 @@
+var region = require('caniuse-lite/dist/unpacker/region').default
+var path = require('path')
+var fs = require('fs')
+
+var BrowserslistError = require('./error')
+
+var IS_SECTION = /^\s*\[(.+)\]\s*$/
+var CONFIG_PATTERN = /^browserslist-config-/
+var SCOPED_CONFIG__PATTERN = /@[^/]+\/browserslist-config(-|$|\/)/
+var TIME_TO_UPDATE_CANIUSE = 6 * 30 * 24 * 60 * 60 * 1000
+var FORMAT = 'Browserslist config should be a string or an array ' +
+             'of strings with browser queries'
+
+var dataTimeChecked = false
+var filenessCache = { }
+var configCache = { }
+function checkExtend (name) {
+  var use = ' Use `dangerousExtend` option to disable.'
+  if (!CONFIG_PATTERN.test(name) && !SCOPED_CONFIG__PATTERN.test(name)) {
+    throw new BrowserslistError(
+      'Browserslist config needs `browserslist-config-` prefix. ' + use)
+  }
+  if (name.replace(/^@[^/]+\//, '').indexOf('.') !== -1) {
+    throw new BrowserslistError(
+      '`.` not allowed in Browserslist config name. ' + use)
+  }
+  if (name.indexOf('node_modules') !== -1) {
+    throw new BrowserslistError(
+      '`node_modules` not allowed in Browserslist config.' + use)
+  }
+}
+
+function isFile (file) {
+  if (file in filenessCache) {
+    return filenessCache[file]
+  }
+  var result = fs.existsSync(file) && fs.statSync(file).isFile()
+  if (!process.env.BROWSERSLIST_DISABLE_CACHE) {
+    filenessCache[file] = result
+  }
+  return result
+}
+
+function eachParent (file, callback) {
+  var loc = path.resolve(file)
+  do {
+    var result = callback(loc)
+    if (typeof result !== 'undefined') return result
+  } while (loc !== (loc = path.dirname(loc)))
+  return undefined
+}
+
+function check (section) {
+  if (Array.isArray(section)) {
+    for (var i = 0; i < section.length; i++) {
+      if (typeof section[i] !== 'string') {
+        throw new BrowserslistError(FORMAT)
+      }
+    }
+  } else if (typeof section !== 'string') {
+    throw new BrowserslistError(FORMAT)
+  }
+}
+
+function pickEnv (config, opts) {
+  if (typeof config !== 'object') return config
+
+  var name
+  if (typeof opts.env === 'string') {
+    name = opts.env
+  } else if (process.env.BROWSERSLIST_ENV) {
+    name = process.env.BROWSERSLIST_ENV
+  } else if (process.env.NODE_ENV) {
+    name = process.env.NODE_ENV
+  } else {
+    name = 'production'
+  }
+
+  return config[name] || config.defaults
+}
+
+function parsePackage (file) {
+  var config = JSON.parse(fs.readFileSync(file))
+  if (config.browserlist && !config.browserslist) {
+    throw new BrowserslistError(
+      '`browserlist` key instead of `browserslist` in ' + file)
+  }
+  var list = config.browserslist
+  if (Array.isArray(list) || typeof list === 'string') {
+    list = { defaults: list }
+  }
+  for (var i in list) {
+    check(list[i])
+  }
+
+  return list
+}
+
+function latestReleaseTime (agents) {
+  var latest = 0
+  for (var name in agents) {
+    var dates = agents[name].releaseDate || { }
+    for (var key in dates) {
+      if (latest < dates[key]) {
+        latest = dates[key]
+      }
+    }
+  }
+  return latest * 1000
+}
+
+module.exports = {
+  loadQueries: function loadQueries (context, name) {
+    if (!context.dangerousExtend) checkExtend(name)
+    // eslint-disable-next-line security/detect-non-literal-require
+    var queries = require(require.resolve(name, { paths: ['.'] }))
+    if (!Array.isArray(queries)) {
+      throw new BrowserslistError(
+        '`' + name + '` config exports not an array of queries')
+    }
+    return queries
+  },
+
+  getStat: function getStat (opts, data) {
+    var stats
+    if (opts.stats) {
+      stats = opts.stats
+    } else if (process.env.BROWSERSLIST_STATS) {
+      stats = process.env.BROWSERSLIST_STATS
+    } else if (opts.path && path.resolve && fs.existsSync) {
+      stats = eachParent(opts.path, function (dir) {
+        var file = path.join(dir, 'browserslist-stats.json')
+        return isFile(file) ? file : undefined
+      })
+    }
+
+    if (typeof stats === 'string') {
+      try {
+        stats = JSON.parse(fs.readFileSync(stats))
+      } catch (e) {
+        throw new BrowserslistError('Can\'t read ' + stats)
+      }
+    }
+
+    if (stats && 'dataByBrowser' in stats) {
+      stats = stats.dataByBrowser
+    }
+
+    if (typeof stats !== 'object') return undefined
+
+    var normalized = { }
+    for (var i in stats) {
+      var versions = Object.keys(stats[i])
+      if (versions.length === 1 && data[i] && data[i].versions.length === 1) {
+        var normal = Object.keys(data[i].versions)[0]
+        normalized[i] = { }
+        normalized[i][normal] = stats[i][versions[0]]
+      } else {
+        normalized[i] = stats[i]
+      }
+    }
+
+    return normalized
+  },
+
+  loadConfig: function loadConfig (opts) {
+    if (process.env.BROWSERSLIST) {
+      return process.env.BROWSERSLIST
+    } else if (opts.config || process.env.BROWSERSLIST_CONFIG) {
+      var file = opts.config || process.env.BROWSERSLIST_CONFIG
+      if (path.basename(file) === 'package.json') {
+        return pickEnv(parsePackage(file), opts)
+      } else {
+        return pickEnv(module.exports.readConfig(file), opts)
+      }
+    } else if (opts.path) {
+      return pickEnv(module.exports.findConfig(opts.path), opts)
+    } else {
+      return undefined
+    }
+  },
+
+  loadCountry: function loadCountry (usage, country) {
+    var code = country.replace(/[^\w-]/g, '')
+    if (!usage[code]) {
+      // eslint-disable-next-line security/detect-non-literal-require
+      var compressed = require('caniuse-lite/data/regions/' + code + '.js')
+      var data = region(compressed)
+      usage[country] = { }
+      for (var i in data) {
+        for (var j in data[i]) {
+          usage[country][i + ' ' + j] = data[i][j]
+        }
+      }
+    }
+  },
+
+  parseConfig: function parseConfig (string) {
+    var result = { defaults: [] }
+    var sections = ['defaults']
+
+    string.toString()
+      .replace(/#[^\n]*/g, '')
+      .split(/\n|,/)
+      .map(function (line) {
+        return line.trim()
+      })
+      .filter(function (line) {
+        return line !== ''
+      })
+      .forEach(function (line) {
+        if (IS_SECTION.test(line)) {
+          sections = line.match(IS_SECTION)[1].trim().split(' ')
+          sections.forEach(function (section) {
+            if (result[section]) {
+              throw new BrowserslistError(
+                'Duplicate section ' + section + ' in Browserslist config')
+            }
+            result[section] = []
+          })
+        } else {
+          sections.forEach(function (section) {
+            result[section].push(line)
+          })
+        }
+      })
+
+    return result
+  },
+
+  readConfig: function readConfig (file) {
+    if (!isFile(file)) {
+      throw new BrowserslistError('Can\'t read ' + file + ' config')
+    }
+    return module.exports.parseConfig(fs.readFileSync(file))
+  },
+
+  findConfig: function findConfig (from) {
+    from = path.resolve(from)
+
+    var cacheKey = isFile(from) ? path.dirname(from) : from
+    if (cacheKey in configCache) {
+      return configCache[cacheKey]
+    }
+
+    var resolved = eachParent(from, function (dir) {
+      var config = path.join(dir, 'browserslist')
+      var pkg = path.join(dir, 'package.json')
+      var rc = path.join(dir, '.browserslistrc')
+
+      var pkgBrowserslist
+      if (isFile(pkg)) {
+        try {
+          pkgBrowserslist = parsePackage(pkg)
+        } catch (e) {
+          if (e.name === 'BrowserslistError') throw e
+          console.warn(
+            '[Browserslist] Could not parse ' + pkg + '. Ignoring it.')
+        }
+      }
+
+      if (isFile(config) && pkgBrowserslist) {
+        throw new BrowserslistError(
+          dir + ' contains both browserslist and package.json with browsers')
+      } else if (isFile(rc) && pkgBrowserslist) {
+        throw new BrowserslistError(
+          dir + ' contains both .browserslistrc and package.json with browsers')
+      } else if (isFile(config) && isFile(rc)) {
+        throw new BrowserslistError(
+          dir + ' contains both .browserslistrc and browserslist')
+      } else if (isFile(config)) {
+        return module.exports.readConfig(config)
+      } else if (isFile(rc)) {
+        return module.exports.readConfig(rc)
+      } else {
+        return pkgBrowserslist
+      }
+    })
+    if (!process.env.BROWSERSLIST_DISABLE_CACHE) {
+      configCache[cacheKey] = resolved
+    }
+    return resolved
+  },
+
+  clearCaches: function clearCaches () {
+    dataTimeChecked = false
+    filenessCache = { }
+    configCache = { }
+  },
+
+  oldDataWarning: function oldDataWarning (agentsObj) {
+    if (dataTimeChecked) return
+    dataTimeChecked = true
+    if (process.env.BROWSERSLIST_IGNORE_OLD_DATA) return
+
+    var latest = latestReleaseTime(agentsObj)
+    var halfYearAgo = Date.now() - TIME_TO_UPDATE_CANIUSE
+
+    if (latest !== 0 && latest < halfYearAgo) {
+      var command = 'npm update'
+      eachParent(__filename, function (dir) {
+        var pckg = path.join(dir, 'package.json')
+        var yarnLock = path.join(dir, 'yarn.lock')
+        if (isFile(pckg) && isFile(yarnLock)) {
+          command = 'yarn upgrade'
+        }
+      })
+      console.warn(
+        'Browserslist: caniuse-lite is outdated. ' +
+        'Please run next command `' + command + '`'
+      )
+    }
+  },
+
+  currentNode: function currentNode () {
+    return 'node ' + process.versions.node
+  }
+}
diff --git a/node_modules/browserslist/package.json b/node_modules/browserslist/package.json
new file mode 100644
index 0000000..c05e040
--- /dev/null
+++ b/node_modules/browserslist/package.json
@@ -0,0 +1,66 @@
+{
+  "_from": "browserslist@^4.7.0",
+  "_id": "browserslist@4.7.0",
+  "_inBundle": false,
+  "_integrity": "sha512-9rGNDtnj+HaahxiVV38Gn8n8Lr8REKsel68v1sPFfIGEK6uSXTY3h9acgiT1dZVtOOUtifo/Dn8daDQ5dUgVsA==",
+  "_location": "/browserslist",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "browserslist@^4.7.0",
+    "name": "browserslist",
+    "escapedName": "browserslist",
+    "rawSpec": "^4.7.0",
+    "saveSpec": null,
+    "fetchSpec": "^4.7.0"
+  },
+  "_requiredBy": [
+    "/autoprefixer"
+  ],
+  "_resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.7.0.tgz",
+  "_shasum": "9ee89225ffc07db03409f2fee524dc8227458a17",
+  "_spec": "browserslist@^4.7.0",
+  "_where": "/home/dstaesse/git/website/node_modules/autoprefixer",
+  "author": {
+    "name": "Andrey Sitnik",
+    "email": "andrey@sitnik.ru"
+  },
+  "bin": {
+    "browserslist": "./cli.js"
+  },
+  "browser": {
+    "./node.js": "./browser.js",
+    "path": false
+  },
+  "bugs": {
+    "url": "https://github.com/browserslist/browserslist/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "caniuse-lite": "^1.0.30000989",
+    "electron-to-chromium": "^1.3.247",
+    "node-releases": "^1.1.29"
+  },
+  "deprecated": false,
+  "description": "Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-env-preset",
+  "eslintIgnore": [
+    "test/fixtures"
+  ],
+  "homepage": "https://github.com/browserslist/browserslist#readme",
+  "keywords": [
+    "caniuse",
+    "browsers",
+    "target"
+  ],
+  "license": "MIT",
+  "name": "browserslist",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/browserslist/browserslist.git"
+  },
+  "sharec": {
+    "version": "0.4.2"
+  },
+  "version": "4.7.0"
+}