build: Add some required modules for node

9 files changed, 1065 insertions, 0 deletions

diff --git a/node_modules/postcss-value-parser/LICENSE b/node_modules/postcss-value-parser/LICENSE
new file mode 100644
index 0000000..6dcaefc
--- /dev/null
+++ b/node_modules/postcss-value-parser/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) Bogdan Chadkin <trysound@yandex.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/postcss-value-parser/README.md b/node_modules/postcss-value-parser/README.md
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+++ b/node_modules/postcss-value-parser/README.md
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+# postcss-value-parser
+
+[![Travis CI](https://travis-ci.org/TrySound/postcss-value-parser.svg)](https://travis-ci.org/TrySound/postcss-value-parser)
+
+Transforms CSS declaration values and at-rule parameters into a tree of nodes, and provides a simple traversal API.
+
+## Usage
+
+```js
+var valueParser = require('postcss-value-parser');
+var cssBackgroundValue = 'url(foo.png) no-repeat 40px 73%';
+var parsedValue = valueParser(cssBackgroundValue);
+// parsedValue exposes an API described below,
+// e.g. parsedValue.walk(..), parsedValue.toString(), etc.
+```
+
+For example, parsing the value `rgba(233, 45, 66, .5)` will return the following:
+
+```js
+{
+  nodes: [
+    {
+      type: 'function',
+      value: 'rgba',
+      before: '',
+      after: '',
+      nodes: [
+        { type: 'word', value: '233' },
+        { type: 'div', value: ',', before: '', after: ' ' },
+        { type: 'word', value: '45' },
+        { type: 'div', value: ',', before: '', after: ' ' },
+        { type: 'word', value: '66' },
+        { type: 'div', value: ',', before: ' ', after: '' },
+        { type: 'word', value: '.5' }
+      ]
+    }
+  ]
+}
+```
+
+If you wanted to convert each `rgba()` value in `sourceCSS` to a hex value, you could do so like this:
+
+```js
+var valueParser = require('postcss-value-parser');
+
+var parsed = valueParser(sourceCSS);
+
+// walk() will visit all the of the nodes in the tree,
+// invoking the callback for each.
+parsed.walk(function (node) {
+
+  // Since we only want to transform rgba() values,
+  // we can ignore anything else.
+  if (node.type !== 'function' && node.value !== 'rgba') return;
+
+  // We can make an array of the rgba() arguments to feed to a
+  // convertToHex() function
+  var color = node.nodes.filter(function (node) {
+    return node.type === 'word';
+  }).map(function (node) {
+    return Number(node.value);
+  }); // [233, 45, 66, .5]
+
+  // Now we will transform the existing rgba() function node
+  // into a word node with the hex value
+  node.type = 'word';
+  node.value = convertToHex(color);
+})
+
+parsed.toString(); // #E92D42
+```
+
+## Nodes
+
+Each node is an object with these common properties:
+
+- **type**: The type of node (`word`, `string`, `div`, `space`, `comment`, or `function`).
+  Each type is documented below.
+- **value**: Each node has a `value` property; but what exactly `value` means
+  is specific to the node type. Details are documented for each type below.
+- **sourceIndex**: The starting index of the node within the original source
+  string. For example, given the source string `10px 20px`, the `word` node
+  whose value is `20px` will have a `sourceIndex` of `5`.
+
+### word
+
+The catch-all node type that includes keywords (e.g. `no-repeat`),
+quantities (e.g. `20px`, `75%`, `1.5`), and hex colors (e.g. `#e6e6e6`).
+
+Node-specific properties:
+
+- **value**: The "word" itself.
+
+### string
+
+A quoted string value, e.g. `"something"` in `content: "something";`.
+
+Node-specific properties:
+
+- **value**: The text content of the string.
+- **quote**: The quotation mark surrounding the string, either `"` or `'`.
+- **unclosed**: `true` if the string was not closed properly. e.g. `"unclosed string  `.
+
+### div
+
+A divider, for example
+
+- `,` in `animation-duration: 1s, 2s, 3s`
+- `/` in `border-radius: 10px / 23px`
+- `:` in `(min-width: 700px)`
+
+Node-specific properties:
+
+- **value**: The divider character. Either `,`, `/`, or `:` (see examples above).
+- **before**: Whitespace before the divider.
+- **after**: Whitespace after the divider.
+
+### space
+
+Whitespace used as a separator, e.g. ` ` occurring twice in `border: 1px solid black;`.
+
+Node-specific properties:
+
+- **value**: The whitespace itself.
+
+### comment
+
+A CSS comment starts with `/*` and ends with `*/`
+
+Node-specific properties:
+
+- **value**: The comment value without `/*` and `*/`
+- **unclosed**: `true` if the comment was not closed properly. e.g. `/* comment without an end  `.
+
+### function
+
+A CSS function, e.g. `rgb(0,0,0)` or `url(foo.bar)`.
+
+Function nodes have nodes nested within them: the function arguments.
+
+Additional properties:
+
+- **value**: The name of the function, e.g. `rgb` in `rgb(0,0,0)`.
+- **before**: Whitespace after the opening parenthesis and before the first argument,
+  e.g. `  ` in `rgb(  0,0,0)`.
+- **after**: Whitespace before the closing parenthesis and after the last argument,
+  e.g. `  ` in `rgb(0,0,0  )`.
+- **nodes**: More nodes representing the arguments to the function.
+- **unclosed**: `true` if the parentheses was not closed properly. e.g. `( unclosed-function  `.
+
+Media features surrounded by parentheses are considered functions with an
+empty value. For example, `(min-width: 700px)` parses to these nodes:
+
+```js
+[
+  {
+    type: 'function', value: '', before: '', after: '',
+    nodes: [
+      { type: 'word', value: 'min-width' },
+      { type: 'div', value: ':', before: '', after: ' ' },
+      { type: 'word', value: '700px' }
+    ]
+  }
+]
+```
+
+`url()` functions can be parsed a little bit differently depending on
+whether the first character in the argument is a quotation mark.
+
+`url( /gfx/img/bg.jpg )` parses to:
+
+```js
+{ type: 'function', sourceIndex: 0, value: 'url', before: ' ', after: ' ', nodes: [
+    { type: 'word', sourceIndex: 5, value: '/gfx/img/bg.jpg' }
+] }
+```
+
+`url( "/gfx/img/bg.jpg" )`, on the other hand, parses to:
+
+```js
+{ type: 'function', sourceIndex: 0, value: 'url', before: ' ', after: ' ', nodes: [
+     type: 'string', sourceIndex: 5, quote: '"', value: '/gfx/img/bg.jpg' },
+] }
+```
+
+### unicode-range
+
+The unicode-range CSS descriptor sets the specific range of characters to be 
+used from a font defined by @font-face and made available 
+for use on the current page (`unicode-range: U+0025-00FF`).
+
+Node-specific properties:
+
+- **value**: The "unicode-range" itself.
+
+## API
+
+```
+var valueParser = require('postcss-value-parser');
+```
+
+### valueParser.unit(quantity)
+
+Parses `quantity`, distinguishing the number from the unit. Returns an object like the following:
+
+```js
+// Given 2rem
+{
+  number: '2',
+  unit: 'rem'
+}
+```
+
+If the `quantity` argument cannot be parsed as a number, returns `false`.
+
+*This function does not parse complete values*: you cannot pass it `1px solid black` and expect `px` as
+the unit. Instead, you should pass it single quantities only. Parse `1px solid black`, then pass it
+the stringified `1px` node (a `word` node) to parse the number and unit.
+
+### valueParser.stringify(nodes[, custom])
+
+Stringifies a node or array of nodes.
+
+The `custom` function is called for each `node`; return a string to override the default behaviour.
+
+### valueParser.walk(nodes, callback[, bubble])
+
+Walks each provided node, recursively walking all descendent nodes within functions.
+
+Returning `false` in the `callback` will prevent traversal of descendent nodes (within functions).
+You can use this feature to for shallow iteration, walking over only the *immediate* children.
+*Note: This only applies if `bubble` is `false` (which is the default).*
+
+By default, the tree is walked from the outermost node inwards.
+To reverse the direction, pass `true` for the `bubble` argument.
+
+The `callback` is invoked with three arguments: `callback(node, index, nodes)`.
+
+- `node`: The current node.
+- `index`: The index of the current node.
+- `nodes`: The complete nodes array passed to `walk()`.
+
+Returns the `valueParser` instance.
+
+### var parsed = valueParser(value)
+
+Returns the parsed node tree.
+
+### parsed.nodes
+
+The array of nodes.
+
+### parsed.toString()
+
+Stringifies the node tree.
+
+### parsed.walk(callback[, bubble])
+
+Walks each node inside `parsed.nodes`. See the documentation for `valueParser.walk()` above.
+
+# License
+
+MIT © [Bogdan Chadkin](mailto:trysound@yandex.ru)
diff --git a/node_modules/postcss-value-parser/lib/index.d.ts b/node_modules/postcss-value-parser/lib/index.d.ts
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+declare namespace postcssValueParser {
+  interface BaseNode {
+    /**
+     * The offset inside the CSS value at which the node starts
+     */
+    sourceIndex: number;
+
+    /**
+     * The node's characteristic value
+     */
+    value: string;
+  }
+
+  interface ClosableNode {
+    /**
+     * Whether the parsed CSS value ended before the node was properly closed
+     */
+    unclosed?: true;
+  }
+
+  interface AdjacentAwareNode {
+    /**
+     * The token at the start of the node
+     */
+    before: string;
+
+    /**
+    * The token at the end of the node
+    */
+    after: string;
+  }
+
+  interface CommentNode extends BaseNode, ClosableNode {
+    type: "comment";
+  }
+
+  interface DivNode extends BaseNode, AdjacentAwareNode {
+    type: "div";
+  }
+
+  interface FunctionNode extends BaseNode, ClosableNode, AdjacentAwareNode {
+    type: "function";
+
+    /**
+     * Nodes inside the function
+     */
+    nodes: Node[];
+  }
+
+  interface SpaceNode extends BaseNode {
+    type: "space";
+  }
+
+  interface StringNode extends BaseNode, ClosableNode {
+    type: "string";
+
+    /**
+     * The quote type delimiting the string
+     */
+    quote: '"' | "'";
+  }
+
+  interface UnicodeRangeNode extends BaseNode {
+    type: "unicode-range";
+  }
+
+  interface WordNode extends BaseNode {
+    type: "word";
+  }
+
+  /**
+   * Any node parsed from a CSS value
+   */
+  type Node =
+    | CommentNode
+    | DivNode
+    | FunctionNode
+    | SpaceNode
+    | StringNode
+    | UnicodeRangeNode
+    | WordNode;
+
+  interface CustomStringifierCallback {
+    /**
+     * @param node The node to stringify
+     * @returns The serialized CSS representation of the node
+     */
+    (nodes: Node): string;
+  }
+
+  interface WalkCallback {
+    /**
+     * @param node  The currently visited node
+     * @param index The index of the node in the series of parsed nodes
+     * @param nodes The series of parsed nodes
+     * @returns Returning `false` will prevent traversal of descendant nodes (only applies if `bubble` was set to `true` in the `walk()` call)
+     */
+    (node: Node, index: number, nodes: Node[]): void | false;
+  }
+
+  /**
+   * A CSS dimension, decomposed into its numeric and unit parts
+   */
+  interface Dimension {
+    number: string;
+    unit: string;
+  }
+
+  /**
+   * A wrapper around a parsed CSS value that allows for inspecting and walking nodes
+   */
+  interface ParsedValue {
+    /**
+     * The series of parsed nodes
+     */
+    nodes: Node[];
+
+    /**
+     * Walk all parsed nodes, applying a callback
+     *
+     * @param callback A visitor callback that will be executed for each node
+     * @param bubble   When set to `true`, walking will be done inside-out instead of outside-in
+     */
+    walk(callback: WalkCallback, bubble?: boolean): this;
+  }
+
+  interface ValueParser {
+    /**
+     * Decompose a CSS dimension into its numeric and unit part
+     *
+     * @param value The dimension to decompose
+     * @returns An object representing `number` and `unit` part of the dimension or `false` if the decomposing fails
+     */
+    unit(value: string): Dimension | false;
+
+    /**
+     * Serialize a series of nodes into a CSS value
+     *
+     * @param nodes  The nodes to stringify
+     * @param custom A custom stringifier callback
+     * @returns The generated CSS value
+     */
+    stringify(nodes: Node[], custom?: CustomStringifierCallback): string;
+
+    /**
+     * Walk a series of nodes, applying a callback
+     *
+     * @param nodes    The nodes to walk
+     * @param callback A visitor callback that will be executed for each node
+     * @param bubble   When set to `true`, walking will be done inside-out instead of outside-in
+     */
+    walk(nodes: Node[], callback: WalkCallback, bubble?: boolean): void;
+
+    /**
+     * Parse a CSS value into a series of nodes to operate on
+     *
+     * @param value The value to parse
+     */
+    new (value: string): ParsedValue;
+
+    /**
+     * Parse a CSS value into a series of nodes to operate on
+     *
+     * @param value The value to parse
+     */
+    (value: string): ParsedValue;
+  }
+}
+
+declare const postcssValueParser: postcssValueParser.ValueParser;
+
+export = postcssValueParser;
diff --git a/node_modules/postcss-value-parser/lib/index.js b/node_modules/postcss-value-parser/lib/index.js
new file mode 100644
index 0000000..f9ac0e6
--- /dev/null
+++ b/node_modules/postcss-value-parser/lib/index.js
@@ -0,0 +1,28 @@
+var parse = require("./parse");
+var walk = require("./walk");
+var stringify = require("./stringify");
+
+function ValueParser(value) {
+  if (this instanceof ValueParser) {
+    this.nodes = parse(value);
+    return this;
+  }
+  return new ValueParser(value);
+}
+
+ValueParser.prototype.toString = function() {
+  return Array.isArray(this.nodes) ? stringify(this.nodes) : "";
+};
+
+ValueParser.prototype.walk = function(cb, bubble) {
+  walk(this.nodes, cb, bubble);
+  return this;
+};
+
+ValueParser.unit = require("./unit");
+
+ValueParser.walk = walk;
+
+ValueParser.stringify = stringify;
+
+module.exports = ValueParser;
diff --git a/node_modules/postcss-value-parser/lib/parse.js b/node_modules/postcss-value-parser/lib/parse.js
new file mode 100644
index 0000000..502b5ba
--- /dev/null
+++ b/node_modules/postcss-value-parser/lib/parse.js
@@ -0,0 +1,304 @@
+var openParentheses = "(".charCodeAt(0);
+var closeParentheses = ")".charCodeAt(0);
+var singleQuote = "'".charCodeAt(0);
+var doubleQuote = '"'.charCodeAt(0);
+var backslash = "\\".charCodeAt(0);
+var slash = "/".charCodeAt(0);
+var comma = ",".charCodeAt(0);
+var colon = ":".charCodeAt(0);
+var star = "*".charCodeAt(0);
+var uLower = "u".charCodeAt(0);
+var uUpper = "U".charCodeAt(0);
+var plus = "+".charCodeAt(0);
+var isUnicodeRange = /^[a-f0-9?-]+$/i;
+
+module.exports = function(input) {
+  var tokens = [];
+  var value = input;
+
+  var next,
+    quote,
+    prev,
+    token,
+    escape,
+    escapePos,
+    whitespacePos,
+    parenthesesOpenPos;
+  var pos = 0;
+  var code = value.charCodeAt(pos);
+  var max = value.length;
+  var stack = [{ nodes: tokens }];
+  var balanced = 0;
+  var parent;
+
+  var name = "";
+  var before = "";
+  var after = "";
+
+  while (pos < max) {
+    // Whitespaces
+    if (code <= 32) {
+      next = pos;
+      do {
+        next += 1;
+        code = value.charCodeAt(next);
+      } while (code <= 32);
+      token = value.slice(pos, next);
+
+      prev = tokens[tokens.length - 1];
+      if (code === closeParentheses && balanced) {
+        after = token;
+      } else if (prev && prev.type === "div") {
+        prev.after = token;
+      } else if (
+        code === comma ||
+        code === colon ||
+        (code === slash &&
+          value.charCodeAt(next + 1) !== star &&
+          (!parent ||
+            (parent && parent.type === "function" && parent.value !== "calc")))
+      ) {
+        before = token;
+      } else {
+        tokens.push({
+          type: "space",
+          sourceIndex: pos,
+          value: token
+        });
+      }
+
+      pos = next;
+
+      // Quotes
+    } else if (code === singleQuote || code === doubleQuote) {
+      next = pos;
+      quote = code === singleQuote ? "'" : '"';
+      token = {
+        type: "string",
+        sourceIndex: pos,
+        quote: quote
+      };
+      do {
+        escape = false;
+        next = value.indexOf(quote, next + 1);
+        if (~next) {
+          escapePos = next;
+          while (value.charCodeAt(escapePos - 1) === backslash) {
+            escapePos -= 1;
+            escape = !escape;
+          }
+        } else {
+          value += quote;
+          next = value.length - 1;
+          token.unclosed = true;
+        }
+      } while (escape);
+      token.value = value.slice(pos + 1, next);
+
+      tokens.push(token);
+      pos = next + 1;
+      code = value.charCodeAt(pos);
+
+      // Comments
+    } else if (code === slash && value.charCodeAt(pos + 1) === star) {
+      token = {
+        type: "comment",
+        sourceIndex: pos
+      };
+
+      next = value.indexOf("*/", pos);
+      if (next === -1) {
+        token.unclosed = true;
+        next = value.length;
+      }
+
+      token.value = value.slice(pos + 2, next);
+      tokens.push(token);
+
+      pos = next + 2;
+      code = value.charCodeAt(pos);
+
+      // Operation within calc
+    } else if (
+      (code === slash || code === star) &&
+      parent &&
+      parent.type === "function" &&
+      parent.value === "calc"
+    ) {
+      token = value[pos];
+      tokens.push({
+        type: "word",
+        sourceIndex: pos - before.length,
+        value: token
+      });
+      pos += 1;
+      code = value.charCodeAt(pos);
+
+      // Dividers
+    } else if (code === slash || code === comma || code === colon) {
+      token = value[pos];
+
+      tokens.push({
+        type: "div",
+        sourceIndex: pos - before.length,
+        value: token,
+        before: before,
+        after: ""
+      });
+      before = "";
+
+      pos += 1;
+      code = value.charCodeAt(pos);
+
+      // Open parentheses
+    } else if (openParentheses === code) {
+      // Whitespaces after open parentheses
+      next = pos;
+      do {
+        next += 1;
+        code = value.charCodeAt(next);
+      } while (code <= 32);
+      parenthesesOpenPos = pos;
+      token = {
+        type: "function",
+        sourceIndex: pos - name.length,
+        value: name,
+        before: value.slice(parenthesesOpenPos + 1, next)
+      };
+      pos = next;
+
+      if (name === "url" && code !== singleQuote && code !== doubleQuote) {
+        next -= 1;
+        do {
+          escape = false;
+          next = value.indexOf(")", next + 1);
+          if (~next) {
+            escapePos = next;
+            while (value.charCodeAt(escapePos - 1) === backslash) {
+              escapePos -= 1;
+              escape = !escape;
+            }
+          } else {
+            value += ")";
+            next = value.length - 1;
+            token.unclosed = true;
+          }
+        } while (escape);
+        // Whitespaces before closed
+        whitespacePos = next;
+        do {
+          whitespacePos -= 1;
+          code = value.charCodeAt(whitespacePos);
+        } while (code <= 32);
+        if (parenthesesOpenPos < whitespacePos) {
+          if (pos !== whitespacePos + 1) {
+            token.nodes = [
+              {
+                type: "word",
+                sourceIndex: pos,
+                value: value.slice(pos, whitespacePos + 1)
+              }
+            ];
+          } else {
+            token.nodes = [];
+          }
+          if (token.unclosed && whitespacePos + 1 !== next) {
+            token.after = "";
+            token.nodes.push({
+              type: "space",
+              sourceIndex: whitespacePos + 1,
+              value: value.slice(whitespacePos + 1, next)
+            });
+          } else {
+            token.after = value.slice(whitespacePos + 1, next);
+          }
+        } else {
+          token.after = "";
+          token.nodes = [];
+        }
+        pos = next + 1;
+        code = value.charCodeAt(pos);
+        tokens.push(token);
+      } else {
+        balanced += 1;
+        token.after = "";
+        tokens.push(token);
+        stack.push(token);
+        tokens = token.nodes = [];
+        parent = token;
+      }
+      name = "";
+
+      // Close parentheses
+    } else if (closeParentheses === code && balanced) {
+      pos += 1;
+      code = value.charCodeAt(pos);
+
+      parent.after = after;
+      after = "";
+      balanced -= 1;
+      stack.pop();
+      parent = stack[balanced];
+      tokens = parent.nodes;
+
+      // Words
+    } else {
+      next = pos;
+      do {
+        if (code === backslash) {
+          next += 1;
+        }
+        next += 1;
+        code = value.charCodeAt(next);
+      } while (
+        next < max &&
+        !(
+          code <= 32 ||
+          code === singleQuote ||
+          code === doubleQuote ||
+          code === comma ||
+          code === colon ||
+          code === slash ||
+          code === openParentheses ||
+          (code === star &&
+            parent &&
+            parent.type === "function" &&
+            parent.value === "calc") ||
+          (code === slash &&
+            parent.type === "function" &&
+            parent.value === "calc") ||
+          (code === closeParentheses && balanced)
+        )
+      );
+      token = value.slice(pos, next);
+
+      if (openParentheses === code) {
+        name = token;
+      } else if (
+        (uLower === token.charCodeAt(0) || uUpper === token.charCodeAt(0)) &&
+        plus === token.charCodeAt(1) &&
+        isUnicodeRange.test(token.slice(2))
+      ) {
+        tokens.push({
+          type: "unicode-range",
+          sourceIndex: pos,
+          value: token
+        });
+      } else {
+        tokens.push({
+          type: "word",
+          sourceIndex: pos,
+          value: token
+        });
+      }
+
+      pos = next;
+    }
+  }
+
+  for (pos = stack.length - 1; pos; pos -= 1) {
+    stack[pos].unclosed = true;
+  }
+
+  return stack[0].nodes;
+};
diff --git a/node_modules/postcss-value-parser/lib/stringify.js b/node_modules/postcss-value-parser/lib/stringify.js
new file mode 100644
index 0000000..5f2c845
--- /dev/null
+++ b/node_modules/postcss-value-parser/lib/stringify.js
@@ -0,0 +1,48 @@
+function stringifyNode(node, custom) {
+  var type = node.type;
+  var value = node.value;
+  var buf;
+  var customResult;
+
+  if (custom && (customResult = custom(node)) !== undefined) {
+    return customResult;
+  } else if (type === "word" || type === "space") {
+    return value;
+  } else if (type === "string") {
+    buf = node.quote || "";
+    return buf + value + (node.unclosed ? "" : buf);
+  } else if (type === "comment") {
+    return "/*" + value + (node.unclosed ? "" : "*/");
+  } else if (type === "div") {
+    return (node.before || "") + value + (node.after || "");
+  } else if (Array.isArray(node.nodes)) {
+    buf = stringify(node.nodes);
+    if (type !== "function") {
+      return buf;
+    }
+    return (
+      value +
+      "(" +
+      (node.before || "") +
+      buf +
+      (node.after || "") +
+      (node.unclosed ? "" : ")")
+    );
+  }
+  return value;
+}
+
+function stringify(nodes, custom) {
+  var result, i;
+
+  if (Array.isArray(nodes)) {
+    result = "";
+    for (i = nodes.length - 1; ~i; i -= 1) {
+      result = stringifyNode(nodes[i], custom) + result;
+    }
+    return result;
+  }
+  return stringifyNode(nodes, custom);
+}
+
+module.exports = stringify;
diff --git a/node_modules/postcss-value-parser/lib/unit.js b/node_modules/postcss-value-parser/lib/unit.js
new file mode 100644
index 0000000..c349661
--- /dev/null
+++ b/node_modules/postcss-value-parser/lib/unit.js
@@ -0,0 +1,120 @@
+var minus = "-".charCodeAt(0);
+var plus = "+".charCodeAt(0);
+var dot = ".".charCodeAt(0);
+var exp = "e".charCodeAt(0);
+var EXP = "E".charCodeAt(0);
+
+// Check if three code points would start a number
+// https://www.w3.org/TR/css-syntax-3/#starts-with-a-number
+function likeNumber(value) {
+  var code = value.charCodeAt(0);
+  var nextCode;
+
+  if (code === plus || code === minus) {
+    nextCode = value.charCodeAt(1);
+
+    if (nextCode >= 48 && nextCode <= 57) {
+      return true;
+    }
+
+    var nextNextCode = value.charCodeAt(2);
+
+    if (nextCode === dot && nextNextCode >= 48 && nextNextCode <= 57) {
+      return true;
+    }
+
+    return false;
+  }
+
+  if (code === dot) {
+    nextCode = value.charCodeAt(1);
+
+    if (nextCode >= 48 && nextCode <= 57) {
+      return true;
+    }
+
+    return false;
+  }
+
+  if (code >= 48 && code <= 57) {
+    return true;
+  }
+
+  return false;
+}
+
+// Consume a number
+// https://www.w3.org/TR/css-syntax-3/#consume-number
+module.exports = function(value) {
+  var pos = 0;
+  var length = value.length;
+  var code;
+  var nextCode;
+  var nextNextCode;
+
+  if (length === 0 || !likeNumber(value)) {
+    return false;
+  }
+
+  code = value.charCodeAt(pos);
+
+  if (code === plus || code === minus) {
+    pos++;
+  }
+
+  while (pos < length) {
+    code = value.charCodeAt(pos);
+
+    if (code < 48 || code > 57) {
+      break;
+    }
+
+    pos += 1;
+  }
+
+  code = value.charCodeAt(pos);
+  nextCode = value.charCodeAt(pos + 1);
+
+  if (code === dot && nextCode >= 48 && nextCode <= 57) {
+    pos += 2;
+
+    while (pos < length) {
+      code = value.charCodeAt(pos);
+
+      if (code < 48 || code > 57) {
+        break;
+      }
+
+      pos += 1;
+    }
+  }
+
+  code = value.charCodeAt(pos);
+  nextCode = value.charCodeAt(pos + 1);
+  nextNextCode = value.charCodeAt(pos + 2);
+
+  if (
+    (code === exp || code === EXP) &&
+    ((nextCode >= 48 && nextCode <= 57) ||
+      ((nextCode === plus || nextCode === minus) &&
+        nextNextCode >= 48 &&
+        nextNextCode <= 57))
+  ) {
+    pos += nextCode === plus || nextCode === minus ? 3 : 2;
+
+    while (pos < length) {
+      code = value.charCodeAt(pos);
+
+      if (code < 48 || code > 57) {
+        break;
+      }
+
+      pos += 1;
+    }
+  }
+
+  return {
+    number: value.slice(0, pos),
+    unit: value.slice(pos)
+  };
+};
diff --git a/node_modules/postcss-value-parser/lib/walk.js b/node_modules/postcss-value-parser/lib/walk.js
new file mode 100644
index 0000000..7666c5b
--- /dev/null
+++ b/node_modules/postcss-value-parser/lib/walk.js
@@ -0,0 +1,22 @@
+module.exports = function walk(nodes, cb, bubble) {
+  var i, max, node, result;
+
+  for (i = 0, max = nodes.length; i < max; i += 1) {
+    node = nodes[i];
+    if (!bubble) {
+      result = cb(node, i, nodes);
+    }
+
+    if (
+      result !== false &&
+      node.type === "function" &&
+      Array.isArray(node.nodes)
+    ) {
+      walk(node.nodes, cb, bubble);
+    }
+
+    if (bubble) {
+      cb(node, i, nodes);
+    }
+  }
+};
diff --git a/node_modules/postcss-value-parser/package.json b/node_modules/postcss-value-parser/package.json
new file mode 100644
index 0000000..07fe880
--- /dev/null
+++ b/node_modules/postcss-value-parser/package.json
@@ -0,0 +1,86 @@
+{
+  "_from": "postcss-value-parser@^4.0.2",
+  "_id": "postcss-value-parser@4.0.2",
+  "_inBundle": false,
+  "_integrity": "sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==",
+  "_location": "/postcss-value-parser",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "postcss-value-parser@^4.0.2",
+    "name": "postcss-value-parser",
+    "escapedName": "postcss-value-parser",
+    "rawSpec": "^4.0.2",
+    "saveSpec": null,
+    "fetchSpec": "^4.0.2"
+  },
+  "_requiredBy": [
+    "/autoprefixer"
+  ],
+  "_resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz",
+  "_shasum": "482282c09a42706d1fc9a069b73f44ec08391dc9",
+  "_spec": "postcss-value-parser@^4.0.2",
+  "_where": "/home/dstaesse/git/website/node_modules/autoprefixer",
+  "author": {
+    "name": "Bogdan Chadkin",
+    "email": "trysound@yandex.ru"
+  },
+  "bugs": {
+    "url": "https://github.com/TrySound/postcss-value-parser/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "Transforms css values and at-rule params into the tree",
+  "devDependencies": {
+    "eslint": "^5.16.0",
+    "husky": "^2.3.0",
+    "lint-staged": "^8.1.7",
+    "prettier": "^1.17.1",
+    "tap-spec": "^5.0.0",
+    "tape": "^4.10.2"
+  },
+  "eslintConfig": {
+    "env": {
+      "es6": true,
+      "node": true
+    },
+    "extends": "eslint:recommended"
+  },
+  "files": [
+    "lib"
+  ],
+  "homepage": "https://github.com/TrySound/postcss-value-parser",
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "keywords": [
+    "postcss",
+    "value",
+    "parser"
+  ],
+  "license": "MIT",
+  "lint-staged": {
+    "*.js": [
+      "eslint",
+      "prettier --write",
+      "git add"
+    ]
+  },
+  "main": "lib/index.js",
+  "name": "postcss-value-parser",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/TrySound/postcss-value-parser.git"
+  },
+  "scripts": {
+    "lint": "yarn lint:js && yarn lint:prettier",
+    "lint:js": "eslint . --cache",
+    "lint:prettier": "prettier '**/*.js' --list-different",
+    "pretest": "yarn lint",
+    "test": "tape test/*.js | tap-spec"
+  },
+  "version": "4.0.2"
+}