Update mocha dependency to version 0.12.1
Update mocha dependency to version 0.12.1

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