chore(package): update ember-cli to version 2.5.1
chore(package): update ember-cli to version 2.5.1

https://greenkeeper.io/
truenorth/ember-material-lite,truenorth/ember-material-lite,mike-north/ember-material-lite,mike-north/ember-material-lite,truenorth/ember-material-lite,mike-north/ember-material-lite