The only required field in a config was `working_directory`. This is now optional (defaults to `.ytdl-sub-working-directory`) making it so a config is no longer required. This sets the stage to onboard noob users who will solely use prebuilt presets in a single subscription file
* post only if > 0
* since todays date
* pypi workflow
* test token
* fix test
* long description
* simpler names
* more simple
* no test pypi in master
* publish only on master
* [BACKEND] Set python __version__ as date, dynamically update it in make
* set version dynamically
* keep empty
* git ignore __init__
* keep init
* keep
* fix unit test
