changing version to 1.21.0 in package.json for release
changing version to 1.21.0 in package.json for release

gboushey/frontend,stopfstedt/frontend,djvoa12/frontend,jrjohnson/frontend,dartajax/frontend,gabycampagna/frontend,thecoolestguy/frontend,jrjohnson/frontend,gabycampagna/frontend,gboushey/frontend,ilios/frontend,ilios/frontend,djvoa12/frontend,thecoolestguy/frontend,dartajax/frontend,stopfstedt/frontend