build: Add some required modules for node

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+# copy(src, dest, [options, callback])
+
+Copy a file or directory. The directory can have contents. Like `cp -r`.
+
+- `src` `<String>`
+- `dest` `<String>` Note that if `src` is a file, `dest` cannot be a directory (see [issue #323](https://github.com/jprichardson/node-fs-extra/issues/323)).
+- `options` `<Object>`
+  - `overwrite` `<boolean>`: overwrite existing file or directory, default is `true`. _Note that the copy operation will silently fail if you set this to `false` and the destination exists._ Use the `errorOnExist` option to change this behavior.
+  - `errorOnExist` `<boolean>`: when `overwrite` is `false` and the destination exists, throw an error. Default is `false`.
+  - `dereference` `<boolean>`: dereference symlinks, default is `false`.
+  - `preserveTimestamps` `<boolean>`: will set last modification and access times to the ones of the original source files, default is `false`.
+  - `filter` `<Function>`: Function to filter copied files. Return `true` to include, `false` to exclude. Can also return a `Promise` that resolves to `true` or `false` (or pass in an `async` function).
+- `callback` `<Function>`
+
+## Example:
+
+```js
+const fs = require('fs-extra')
+
+fs.copy('/tmp/myfile', '/tmp/mynewfile', err => {
+  if (err) return console.error(err)
+
+  console.log('success!')
+}) // copies file
+
+fs.copy('/tmp/mydir', '/tmp/mynewdir', err => {
+  if (err) return console.error(err)
+
+  console.log('success!')
+}) // copies directory, even if it has subdirectories or files
+
+// Promise usage:
+fs.copy('/tmp/myfile', '/tmp/mynewfile')
+.then(() => {
+  console.log('success!')
+})
+.catch(err => {
+  console.error(err)
+})
+```
+
+**Using filter function**
+
+```js
+const fs = require('fs-extra')
+
+const filterFunc = (src, dest) => {
+  // your logic here
+  // it will be copied if return true
+}
+
+fs.copy('/tmp/mydir', '/tmp/mynewdir', { filter: filterFunc }, err => {
+  if (err) return console.error(err)
+
+  console.log('success!')
+})
+```