bump version to 1.2.0
bump version to 1.2.0

chuck-john/draper,SpencerCDixon/draper,donaldpiret/draper,liwangbest/draper,estum/draper,outstand/draper,totzyuta/draper,mallikarjunayaddala/draper,krainboltgreene/draper,yui-knk/draper,yui-knk/draper,baberthal/draper,jianyuan/draper,liwangbest/draper,drapergem/draper,drapergem/draper,SpencerCDixon/draper,drapergem/draper,Bastes/draper,mallikarjunayaddala/draper,Bastes/draper,outstand/draper,turingschool/draper,turingschool/draper,estum/draper,baberthal/draper,chuck-john/draper,totzyuta/draper,sideci-sample/sideci-sample-draper,jianyuan/draper