add node_modules to address #4364

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diff --git a/node_modules/is-builtin-module/readme.md b/node_modules/is-builtin-module/readme.md
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+# is-builtin-module [![Build Status](https://travis-ci.org/sindresorhus/is-builtin-module.svg?branch=master)](https://travis-ci.org/sindresorhus/is-builtin-module)
+
+> Check if a string matches the name of a Node.js builtin module
+
+
+## Install
+
+```
+$ npm install --save is-builtin-module
+```
+
+
+## Usage
+
+```js
+var isBuiltinModule = require('is-builtin-module');
+
+isBuiltinModule('fs');
+//=> true
+
+isBuiltinModule('unicorn');
+//=> false :(
+```
+
+
+## Related
+
+- [builtin-modules](https://github.com/sindresorhus/builtin-modules) - List of the Node.js builtin modules
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)