Update lodash to v4
Update lodash to v4

See if this breaks anything.  Hopefully not cuz the other version is no
longer supported.

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