Django-json-api

- Support dynamic auth at the model level

- Support dynamic auth on client, by passing `auth` of type `requests.auth.AuthBase`

- Cache performance improvements

- Implement `prefetch_related(...)` method on JSONAPIManager
- It was not implemented
- It is meant to prevent n+1 issue on cache querying
- Add optional parameter `prefetch_related` to method `get_many(...)` of JSONAPIModel
- It is meant to prevent n+1 issue on cache querying
- Improve `prefetch_jsonapi` method used in `WithJSONApiQuerySet`
- Now bears nested jsonapi prefetch
- It is meant to prevent n+1 issue on cache querying

- Implement `save(...)` method on JSONAPIModel
- It was not implemented
- Implement `patch(...)` method on JSONAPIClient
- It was not implemented

- Typing rollback