set series_provider_id param for legacy API v1 to optional with a default value of series_provider_default from config

Refactored get_show_list function to allow for offset and limit props

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

Bumped feedparser
Bumped importlib-metadata