array concat functionality added

snippets/concat.md

@@ -0,0 +1,8 @@
+### Concat
+
+Creates a new array concatenating array with any additional arrays and/or values `args` using `Array.concat()`.
+
+```js
+const ArrayConcat = (arr, ...args) => arr.concat(...args); 
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
+```