Update README.md

Author: somonus

README.md

@@ -1,5 +1,9 @@
 # native-echarts
 
+[![NPM Version](https://img.shields.io/npm/v/native-echarts.svg?style=flat)](https://www.npmjs.org/package/native-echarts)
+  [![npm](https://img.shields.io/npm/dm/native-echarts.svg?style=flat)](https://www.npmjs.org/package/native-echarts)
+  [![License](http://img.shields.io/npm/l/native-echarts.svg?style=flat)](https://raw.githubusercontent.com/somonus/native-echarts/master/LICENSE)
+  
 ## install
 
 $ npm install native-echarts --save