chore: add circleci (#2232)

Author: ycjcl868

README.md

@@ -2,6 +2,8 @@ English | [简体中文](./README_zh-CN.md)
 
 # dva
 
+[![codecov](https://codecov.io/gh/dvajs/dva/branch/master/graph/badge.svg)](https://codecov.io/gh/dvajs/dva)
+[![CircleCI](https://circleci.com/gh/dvajs/dva.svg?style=svg)](https://circleci.com/gh/dvajs/dva)
 [![NPM version](https://img.shields.io/npm/v/dva.svg?style=flat)](https://npmjs.org/package/dva)
 [![Build Status](https://img.shields.io/travis/dvajs/dva.svg?style=flat)](https://travis-ci.org/dvajs/dva)
 [![Coverage Status](https://img.shields.io/coveralls/dvajs/dva.svg?style=flat)](https://coveralls.io/r/dvajs/dva)