fix(deepClone): Fixed problems with array values

Would previously create an object with indices as keys. Now properly clones as array.

#658

snippets/deepClone.md

@@ -8,15 +8,25 @@ Use `Object.keys()` and `Array.forEach()` to determine which key-value pairs nee
 
 ```js
 const deepClone = obj => {
-  let clone = Object.assign({}, obj);
-  Object.keys(clone).forEach(
-    key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])
-  );
-  return clone;
+if (Array.isArray(obj)){
+	let arr = [];
+	obj.forEach(
+		(i,v) => (arr[i] = typeof v === 'object' ? deepClone(v) : v)
+	)
+	return arr;
+}else {
+	let clone = Object.assign({}, obj);
+	Object.keys(clone).forEach(
+	key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])
+	);
+	return clone;
+}
 };
 ```
 
 ```js
+
+
 const a = { foo: 'bar', obj: { a: 1, b: 2 } };
 const b = deepClone(a); // a !== b, a.obj !== b.obj
 ```