Update puma dependency to version 1.6.3
Update puma dependency to version 1.6.3

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