refs: https://github.com/TryGhost/Toolbox/issues/168
- Upgraded the remaining themes to be pinned to the canary API
- This required one minor fix because the edit URL has changed for authors in v4/canary
- I also ripped out everywhere that the theme ghost-api version was being pinned to canary, as this was unreliable and only happening in a few places
- It's also going to be unnecessary code as soon as we finish changing to only having one API version
refs: https://github.com/TryGhost/Toolbox/issues/168
- Having large theme fixtures makes tests run slower, so we're working to reduce them
- This fixture was a full copy of a very old version of Casper, but all we needed was a handful of files so that the tests can run
- This theme is also used for testing members, not just price data so I've renamed it for clarity
- The remaining files is the bare minimum we need to test these features
