Update twitter dependency to version 2.1.0
Update twitter dependency to version 2.1.0

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