Add go report badge in readme

ismael_serrano · isserrano · commit 865580e1e09f · 2018-08-24T15:52:01.000+01:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/nginxinc/nginx-prometheus-exporter.svg?branch=master)](https://travis-ci.org/nginxinc/nginx-prometheus-exporter)  [![FOSSA Status](https://app.fossa.io/api/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter.svg?type=shield)](https://app.fossa.io/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter?ref=badge_shield)
+[![Build Status](https://travis-ci.org/nginxinc/nginx-prometheus-exporter.svg?branch=master)](https://travis-ci.org/nginxinc/nginx-prometheus-exporter)  [![FOSSA Status](https://app.fossa.io/api/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter.svg?type=shield)](https://app.fossa.io/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter?ref=badge_shield)  [![Go Report Card](https://goreportcard.com/badge/github.com/nginxinc/nginx-prometheus-exporter)](https://goreportcard.com/report/github.com/nginxinc/nginx-prometheus-exporter)
 
 # NGINX Prometheus Exporter
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-[![Build Status](https://travis-ci.org/nginxinc/nginx-prometheus-exporter.svg?branch=master)](https://travis-ci.org/nginxinc/nginx-prometheus-exporter) [![FOSSA Status](https://app.fossa.io/api/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter.svg?type=shield)](https://app.fossa.io/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter?ref=badge_shield)`
	`1`	+[![Build Status](https://travis-ci.org/nginxinc/nginx-prometheus-exporter.svg?branch=master)](https://travis-ci.org/nginxinc/nginx-prometheus-exporter) [![FOSSA Status](https://app.fossa.io/api/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter.svg?type=shield)](https://app.fossa.io/projects/custom%2B1062%2Fgithub.com%2Fnginxinc%2Fnginx-prometheus-exporter?ref=badge_shield) [![Go Report Card](https://goreportcard.com/badge/github.com/nginxinc/nginx-prometheus-exporter)](https://goreportcard.com/report/github.com/nginxinc/nginx-prometheus-exporter)
`2`	`2`
`3`	`3`	`# NGINX Prometheus Exporter`
`4`	`4`