no issue
- ran [es5-getter-ember-codemod](https://github.com/rondale-sc/es5-getter-ember-codemod)
- [es5 getters RFC](https://github.com/emberjs/rfcs/blob/master/text/0281-es5-getters.md)
- updates the majority of `object.get('property')` with `object.property` with exceptions:
- `.get('nested.property')` - it's not possible to determine if this is relying on "safe" path chaining for when `nested` doesn't exist
- `.get('config.x')` and `.get('settings.x')` - both our `config` and `settings` services are proxy objects which do not support es5 getters
- this PR is not exhaustive, there are still a number of places where `.get('service.foo')` and similar could be replaced but it gets us a long way there in a quick and automated fashion
requires https://github.com/TryGhost/Ghost/pull/9426
- fixed default token component display in {{gh-token-input}}
- if no `tokenComponent` is passed to `{{gh-token-input}}` then it should default to the ember-drag-drop `draggable-object` component but instead it didn't output anything
- put `draggable-object` in quotes because `{{component}}` needs a component name rather than an object
- rename `option` attribute to `content` to match the default `{{draggable-object}}` interface
- add embedded `authors` attr to the Post model
- ensure authors is populated when starting new post
- add validation for empty authors list
- swap author dropdown for a token input in PSM
- show all post authors in posts list
- update tests for `authors`
- always provide through an authors array
- fix mirage serialisation for paginated responses (embedded records were not being serialised)
- unify tags and author inputs design
- remove highlight of primary tags
- highlight internal tags
- remove unnecessary/redundant title attributes on tags
- use SVG icon for "remove option" button in token inputs
