chore(package): update ember-cli to version 2.12.2
chore(package): update ember-cli to version 2.12.2

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