Fetch method update

Author: uttamukkoji

lib/entity.js

@@ -186,7 +186,7 @@ export const fetch = (http, type) => {
           response.data[type]['content_type'] = response.data['content_type']
           response.data[type]['schema'] = response.data['schema']
         }
-        return Object.assign(this, cloneDeep(response.data[type]))
+        return new this.constructor(http, parseData(response, this.stackHeaders))
       } else {
         throw error(response)
       }