Regenerate gemspec for version 0.20.0
Regenerate gemspec for version 0.20.0

HeHStudy/surveyor,bricesanchez/surveyor,risuiowa/surveyor,blueboard/surveyor,risuiowa/surveyor,fhisamoto/surveyor,fhisamoto/surveyor,HeHStudy/surveyor,bricesanchez/surveyor,lampo/surveyor,Guestfolio/surveyor,serracorwin/surveyor,blueboard/surveyor,lampo/surveyor,alanjcfs/surveyor,anitsirc/surveyor,serracorwin/surveyor,bricesanchez/surveyor,fhisamoto/surveyor,Guestfolio/surveyor,HeHStudy/surveyor,risuiowa/surveyor,alanjcfs/surveyor,markedmondson/surveyor,lampo/surveyor,risuiowa/surveyor,serracorwin/surveyor,Guestfolio/surveyor,anitsirc/surveyor,Guestfolio/surveyor,anitsirc/surveyor,HeHStudy/surveyor,alanjcfs/surveyor,NUBIC/surveyor,NUBIC/surveyor,lampo/surveyor,NUBIC/surveyor,blueboard/surveyor,blueboard/surveyor,markedmondson/surveyor,bricesanchez/surveyor,anitsirc/surveyor,fhisamoto/surveyor,markedmondson/surveyor,alanjcfs/surveyor