Update puma to version 3.1.1
Update puma to version 3.1.1

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