add go report to checking code format (apache#19)

Signed-off-by: xiaolong.ran <ranxiaolong716@gmail.com>

Add go report to checking code format

We need to add a check on the code format in ci.

README.md

@@ -18,7 +18,10 @@
     under the License.
 
 -->
-
+[![GoDoc](https://img.shields.io/badge/Godoc-reference-blue.svg)](https://godoc.org/github.com/apache/pulsar-client-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/apache/pulsar-client-go)](https://goreportcard.com/report/github.com/apache/pulsar-client-go)
+[![Language](https://img.shields.io/badge/Language-Go-blue.svg)](https://golang.org/)
+[![LICENSE](https://img.shields.io/hexpm/l/pulsar.svg)](https://github.com/apache/pulsar-client-go/blob/master/LICENSE)
 # Apache Pulsar Go Client Library
 
 > Note: this library is still a work in progress. For production usage, please