Update ember-cli-htmlbars dependency
Update ember-cli-htmlbars dependency

To avoid this deprecation warning under Ember 2.6+:

DEPRECATION: Overriding init without calling this._super is deprecated. Please call `this._super.init && this._super.init.apply(this, arguments);` addon: `ember-cli-htmlbars`
imgix/ember-cli-imgix,imgix/ember-cli-imgix