Bumping to rc6
Bumping to rc6

pedrosmmoreira/clearance,pedrosmmoreira/clearance,thoughtbot/clearance,crowdtap/clearance,benlivermore/clearance,naveed-ahmad/clearance,zernie/clearance,pedrosmmoreira/clearance,janusnic/clearance,openeducation/clearance,benlivermore/clearance,crowdtap/clearance,crowdtap/clearance,zernie/clearance,zernie/clearance,thoughtbot/clearance,naveed-ahmad/clearance,thoughtbot/clearance,janusnic/clearance,benlivermore/clearance,janusnic/clearance,naveed-ahmad/clearance,sferik/clearance