Return a new array with a inserted item at index.
npm install array-insert
$ npm install --save array-insert
`
Usage
`js
var arrayInsert = require('array-insert');
arrayInsert((arrayInsert([1, 2, 4], 2, 3)));
//=> [1, 2, 3, 4]
`
API
$3
#### arr
Required
Type: array
[1, 2, 3]
#### pos
Required
Type: number
2
#### item
Required
Type: any`