chore(package): update ember-ajax to version 2.5.6
chore(package): update ember-ajax to version 2.5.6

https://greenkeeper.io/

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