message: Update handbook package.json
diff: "@ember/render-modifiers": "*",
  "ember-angle-bracket-invocation-polyfill": "*",
  "ember-bootstrap": "*",
  - "ember-changeset": "^2.1.2",
  - "ember-changeset-validations": "^2.1.0",
  + "ember-changeset": "*",
  + "ember-changeset-validations": "*",
  "ember-cli-addon-docs": "*",
  "ember-cli-addon-docs-typedoc": "*",
  "ember-cli-babel": "*",
  "ember-cli-typescript": "*",
  "ember-code-snippet": "*",
  "ember-component-attributes": "*",
  - "ember-content-placeholders": "https://github.com/cos-forks/ember-content-placeholders#master#2018-07-19",
  + "ember-content-placeholders": "*",
  "ember-cp-validations": "*",
  "ember-css-modules": "*",
  "ember-css-modules-sass": "*",
  + "ember-event-helpers": "*",
  "ember-font-awesome": "*",
  "ember-on-modifier": "*",
  "ember-onbeforeunload": "*",
  