✨ Add vue version badge

Author: apertureless

README.md

@@ -1,5 +1,6 @@
 # vue-parallaxy
 [![npm version](https://badge.fury.io/js/vue-parallaxy.svg)](https://badge.fury.io/js/vue-parallaxy)
+[![vue2](https://img.shields.io/badge/vue-2.x-brightgreen.svg)](https://vuejs.org/)
 [![license](https://img.shields.io/github/license/mashape/apistatus.svg)](https://github.com/apertureless/vue-parallax/blob/master/LICENSE.txt)
 
 Is a compontent for fast 60fps parallax scroll effects in vue 2.