Added import exception handling for collections Iterable import for backwards-compatibility
Replaced AttrDict with CleverDict
Fixed `NoneType` issue with rating/votes for imdb popular shows
Fixed issue with bad comparison of NoneTypes for config.ini migration code
Fixed issue with NMA priority being string value when db column is int

Bumped SQLAlchemy
Bumped SQLAlchemy-Utils
Added Greenlet v1.1.2 to requirements.txt
Refactored misc SQLAlchemy code to the latest spec
Bumped main database to v23
Bumped config database to v11
Bumped cache database to v6

added check for 'error' property in responses returned from SiCKRAGE API when accessing series provider endpoints
added check inside `run` method in `ShowTaskForceRemove` class of value returned by `find_show`, if NoneType then exit method by returning NoneType
refactored series provider ID enum to use value as slug