Added badge

Author: a7ul

README.md

@@ -1,5 +1,7 @@
 # react-webcomponentify
 
+[![npm version](https://badge.fury.io/js/react-webcomponentify.svg)](https://badge.fury.io/js/react-webcomponentify)
+
 <img src="https://github.com/master-atul/react-webcomponentify/blob/master/assets/react-webcomponent.png" width="200" height="auto" alt="logo" style="display:block; margin:0 auto;"/>
 
 **Build and export React Components as Web Components without any extra effort.**