Update coveralls to version 0.8.15
Update coveralls to version 0.8.15

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