Update rubycop to version 0.23.0
Update rubycop to version 0.23.0

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