docs: add repo badges

Author: zhengchun

README.md

@@ -1,5 +1,9 @@
 jsonquery
 ====
+[![Build Status](https://travis-ci.org/antchfx/jsonquery.svg?branch=master)](https://travis-ci.org/antchfx/jsonquery)
+[![Coverage Status](https://coveralls.io/repos/github/antchfx/jsonquery/badge.svg?branch=master)](https://coveralls.io/github/antchfx/jsonquery?branch=master)
+[![GoDoc](https://godoc.org/github.com/antchfx/jsonquery?status.svg)](https://godoc.org/github.com/antchfx/jsonquery)
+[![Go Report Card](https://goreportcard.com/badge/github.com/antchfx/jsonquery)](https://goreportcard.com/report/github.com/antchfx/jsonquery)
 
 Overview
 ===