Merge pull request #461 from zhongcj2020/open_jc_sdk

add badges of build, release and coverage

Author: CarlJi

.travis.yml

@@ -8,6 +8,8 @@ install:
 - npm install
 script:
 - npm run build
+- jest --coverage
+- npx codecov
 before_deploy: npm run build
 deploy:
   provider: npm

README.md

@@ -1,11 +1,14 @@
 # Qiniu-JavaScript-SDK
 
+[![Build Status](https://travis-ci.org/qiniu/x.svg?branch=master)](https://travis-ci.org/qiniu/js-sdk)
+[![GitHub release](https://img.shields.io/github/v/tag/qiniu/js-sdk.svg?label=release)](https://github.com/qiniu/js-sdk/releases)
+[![Coverage Status](https://codecov.io/gh/qiniu/js-sdk/branch/master/graph/badge.svg)](https://codecov.io/gh/qiniu/js-sdk)
+
 基于七牛 API 开发的前端 JavaScript SDK
 
 ### 当前版本为 3.x，旧版本文档：[2.x](https://github.com/qiniu/js-sdk/tree/2.x)、[1.x](https://github.com/qiniu/js-sdk/tree/1.x)
 ### 2.x 升级到 3.x 的注意事项请参考[文档](https://github.com/qiniu/js-sdk/wiki/2.x-%E5%8D%87%E7%BA%A7%E5%88%B0-3.x-%E6%96%87%E6%A1%A3%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9)
 
-
 ## 快速导航
 
 * [功能简介](#summary)