add commits history

Author: udaypydi

README.md

@@ -3,6 +3,7 @@
 > A simple react boilerplate with webpack hmr and latest babel packages. It comes with inbuilt [Travis-CI](https://travis-ci.org/) for PR checks, lint checks and builds.
 
 [![TravisCI](https://img.shields.io/travis/udaypydi/react-simple-boilerplate)](https://travis-ci.org/github/udaypydi/react-simple-boilerplate/builds)
+[![Last commit](https://img.shields.io/github/last-commit/udaypydi/react-simple-boilerplate)](https://github.com/udaypydi/react-simple-boilerplate/commits/master)
 [![License](https://img.shields.io/github/license/udaypydi/react-simple-boilerplate)](https://github.com/udaypydi/react-simple-boilerplate/blob/master/LICENSE)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/udaypydi/react-simple-boilerplate/blob/master/CONTRIBUTING.md)