README: update badges

[SKIP CI]

Author: unknwon

README.md

@@ -1,4 +1,6 @@
-# Git Module [![Build Status](https://travis-ci.org/gogs/git-module.svg?branch=master)](https://travis-ci.org/gogs/git-module)
+# Git Module 
+
+[![Build Status](https://img.shields.io/travis/gogs/git-module/master.svg?style=for-the-badge&logo=travis)](https://travis-ci.org/gogs/git-module) [![Sourcegraph](https://img.shields.io/badge/view%20on-Sourcegraph-brightgreen.svg?style=for-the-badge&logo=sourcegraph)](https://sourcegraph.com/github.com/gogs/git-module)
 
 Package git-module is a Go module for Git access through shell commands.