Update to Python 3.10

[rgm89git]

You can update ntscQT to work with Python 3.10+ users?

I recently updated my Python to 3.10, and this error happened when testing:

2022-05-20 14:30:21.917 | DEBUG    | app.NtscApp:sync_nt_to_sliders:267 - set <class 'float'> _composite_preemphasis slider to 0.761281277278842
2022-05-20 14:30:21.922 | ERROR    | __main__:crash_handler:20 - Uncaught exception: setValue(self, int): argument 1 has unexpected type 'float'
NoneType: None