* Modernised JSON format and removed _shields_test style
* Added logoWidth and labelColor fields to JSON response
* Reinstated and updated comment
* Extended expectBadge to accept Joi schemas for all fields
This will definitely save time, and ensure more uniformity.
It moves the `createServiceTester()` calls to a different place from where I'd like them, though I'm happy to have them checked by the linter.
Closes#2701
Often when responding to bug reports it would be helpful to easily run an example failing badge URL. It takes a while to do that, because you have to copy and paste just the right part of the badge URL. This works on `img.shields.io` links as well as partial paths and should make this really easy. 💨
