Fix up CI, improve typing, remove dead imports, and other minor changes

[C0rn3j]

Bump version to 4.4.0 (hope that follows your versioning schemes, did it since I was already touching it up anyway)

Fix up CI using deprecated actions - not 100% sure if those will run now (since they require approval), but fingers crossed, so far never had trouble upgrading through a simple version bump. Should hopefully get rid of the failing CI linter, or at least of the node version warnings in the CI if not that.

Fix up Python versions in setup.py to use currently supported versions by upstream.

Fix broken typing in function parameters.

Add py.typed and tag the packages as supporting typing, to allow tools use the type hints that there are already even though the package is not fully typed yet - https://typing.readthedocs.io/en/latest/spec/distributing.html#packaging-typed-libraries

Remove outdated List, Union and Optional typing imports.

Remove unused imports.

Remove nonexistent win64 platform check - https://docs.python.org/3/library/sys.html#sys.platform

Tagging a new release would be welcome after this is pulled.

[NikOverflow]

please fix the linting

[C0rn3j]

Should be done

[NikOverflow]

i look into the rest tomorrow. The vulnerabilities shouldn't affect us.

[C0rn3j]

Anything left to do here on my side?

[NikOverflow]

i guess not but i can't test it at the moment because i have no time.

[C0rn3j]

Any chance you could find the time for this, or at least make a release with the current master?

I am also down to spend a bit of time to fix potential issues my changes cause, although I do not believe there should be any.