message: adjust dep to match what's needed in packages/authentication
diff: "ember-concurrency": "^0.7.19",
  "ember-data-relationship-tracker": "^0.1.0",
  "ember-elsewhere": "^1.0.0",
  - "ember-fetch": "1.3.0",
  + "ember-fetch": "^1.4.0",
  "ember-mobiledoc-dom-renderer": "^0.5.11",
  "ember-mobiledoc-editor": "^0.5.10",
  "ember-moment": "^7.3.0",
  