updating package.json for v1.20.0 release
updating package.json for v1.20.0 release

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