added helpers lib

lib/helpers.js

@@ -0,0 +1,10 @@
+const _get = (obj, path, defaultValue = null) =>
+  String.prototype.split
+    .call(path, /[,[\].]+?/)
+    .filter(Boolean)
+    .reduce(
+      (a, c) => (Object.hasOwnProperty.call(a, c) ? a[c] : defaultValue),
+      obj
+    );
+
+module.exports = { _get };