Update travis
Update travis

* Add ruby 2.2
* Use latest ruby 2.1

keithpitty/haml,macressler/haml,tangposmarvin/haml,dg1dd1ngs/haml,keithpitty/haml,nazar-pc/haml,haml/haml,haml/haml,stanhu/haml,macressler/haml,haml/haml,sideci-sample/sideci-sample-haml,tangposmarvin/haml,dg1dd1ngs/haml,stanhu/haml,nazar-pc/haml,haml/haml