Add badge to README.md

Author: leezng

README.md

@@ -1,5 +1,9 @@
 # vue-json-pretty
 
+[![Build Status](https://travis-ci.org/leezng/vue-json-pretty.svg?branch=master)](https://travis-ci.org/leezng/vue-json-pretty)
+[![npm package](https://img.shields.io/npm/v/vue-json-pretty.svg)](https://www.npmjs.org/package/vue-json-pretty)
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/leezng/vue-json-pretty/blob/master/LICENSE)
+
 A Vue.js 2.0 Toolkit for JSON.
 
 ## Links

README.zh-CN.md

@@ -1,5 +1,9 @@
 # vue-json-pretty
 
+[![Build Status](https://travis-ci.org/leezng/vue-json-pretty.svg?branch=master)](https://travis-ci.org/leezng/vue-json-pretty)
+[![npm package](https://img.shields.io/npm/v/vue-json-pretty.svg)](https://www.npmjs.org/package/vue-json-pretty)
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/leezng/vue-json-pretty/blob/master/LICENSE)
+
 一个基于 Vue.js 2.0 开发的 JSON 美化插件
 
 - 基本功能: JSON 的美化