chore(package): update ember-cli to version 2.7.0
chore(package): update ember-cli to version 2.7.0

https://greenkeeper.io/
mike-north/ember-api-actions,mike-north/ember-api-actions,truenorth/ember-api-actions,truenorth/ember-api-actions,mike-north/ember-api-actions,mike-north/ember-api-actions