We do not need the `ToJSON` instance for `WithStatus`
it would cause an overlap between:
```
ToJSON a => MimeRender JSON a
```
and
```
forall cty a. MimeRendercty a => MimeRender cty (WithStatus a)
```
and Servant just needs the `MimeRender` typeclass for it to work
* Add some more docs to the UVerb module
* cookbook/uverb: Change GHC versions
CI was complaining some version did not exist. Trying to bump
Also added 8.10.1
* doc/cookbook/uverb: Remove 8.4.4 from tested versions
CI was running into a cabal bug for some reason
