Allow green keeper to update our yarn.lock file
Allow green keeper to update our yarn.lock file

This uses the access token in Travis Config GH_TOKEN to access the
frontend repository and update the lockfile.

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