Update sprockets-rails to version 2.2.0
Update sprockets-rails to version 2.2.0

codeforamerica/follow-all,BryanH/follow-all,BryanH/follow-all,jasnow/follow-all,BryanH/follow-all,codeforamerica/follow-all,codeforamerica/follow-all,jasnow/follow-all,jasnow/follow-all