updating package.json to reflect release version v1.19.0
updating package.json to reflect release version v1.19.0

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