Update puma to version 3.6.0
Update puma to version 3.6.0

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