chore(package): update ember-ajax to version 2.5.4
chore(package): update ember-ajax to version 2.5.4

https://greenkeeper.io/

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