Update rack dependency to version 1.3.5
Update rack dependency to version 1.3.5

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