Update rdoc dependency to version 3.12.2
Update rdoc dependency to version 3.12.2

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