build: Add some required modules for node

1 files changed, 13 insertions, 0 deletions

diff --git a/node_modules/is-extendable/index.js b/node_modules/is-extendable/index.js
new file mode 100644
index 0000000..4ee71a4
--- /dev/null
+++ b/node_modules/is-extendable/index.js
@@ -0,0 +1,13 @@
+/*!
+ * is-extendable <https://github.com/jonschlinkert/is-extendable>
+ *
+ * Copyright (c) 2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function isExtendable(val) {
+  return typeof val !== 'undefined' && val !== null
+    && (typeof val === 'object' || typeof val === 'function');
+};