Fix TravisCI badge

README.md

@@ -4,7 +4,8 @@ bee
 
 Bee is a command-line tool facilitating development of Beego-based application.
 
-[![Build Status](https://drone.io/github.com/beego/bee/status.png)](https://drone.io/github.com/beego/bee/latest)
+[![Build Status](https://img.shields.io/travis/beego/bee.svg?branch=master&label=master)](https://travis-ci.org/beego/bee)
+[![Build Status](https://img.shields.io/travis/beego/bee.svg?branch=develop&label=develop)](https://travis-ci.org/beego/bee)
 
 ## Requirements