Replace cloneDeep method of Lodash from JSON

Author: fayyazarshad

packages/optimizely-sdk/lib/utils/fns/index.js

@@ -39,7 +39,9 @@ module.exports = {
       return to;
     }
   },
-  cloneDeep: require('lodash/cloneDeep'),
+  cloneDeep: function(object) {
+    return JSON.parse(JSON.stringify(object));
+  },
   currentTimestamp: function() {
     return Math.round(new Date().getTime());
   },