Commit c094155

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Create insertAt.js

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	`1`	`+// Insert an item into an array at a specific index (Immutable insertion)`
	`2`	`+/**`
	`3`	`+ *`
	`4`	`+ * @param {Array} arr`
	`5`	`+ * @param {Int} index`
	`6`	`+ * @param {*} values`
	`7`	`+ * @returns arr {New Array}`
	`8`	`+ *`
	`9`	`+ * @demo let bar = insertAt(arr, 2, 'a', 'b')`
	`10`	`+ */`
	`11`	`+export const insertAt = (arr, index) => {`
	`12`	`+ const items = Array.prototype.slice.call(arguments, 2);`
	`13`	`+`
	`14`	`+ return [].concat(arr.slice(0, index), items, arr.slice(index));`
	`15`	`+};`

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