Update README.md

Author: gkorland

README.md

@@ -3,6 +3,7 @@
 [![GitHub issues](https://img.shields.io/github/release/RedisBloom/redisbloom-go.svg)](https://github.com/RedisBloom/redisbloom-go/releases/latest)
 [![Codecov](https://codecov.io/gh/RedisBloom/redisbloom-go/branch/master/graph/badge.svg)](https://codecov.io/gh/RedisBloom/redisbloom-go)
 [![GoDoc](https://godoc.org/github.com/RedisBloom/redisbloom-go?status.svg)](https://godoc.org/github.com/RedisBloom/redisbloom-go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/RedisBloom/redisbloom-go)](https://goreportcard.com/report/github.com/RedisBloom/redisbloom-go)
 
 # redisbloom-go
 [![Forum](https://img.shields.io/badge/Forum-RedisBloom-blue)](https://forum.redislabs.com/c/modules/redisbloom)