Tests and continuous integration: Fixed issues and updated CI configuration #1641

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5 sdist	4m 37s
Python 3.11 on ubuntu-latest PyQt6 wheel	3m 50s
Python 3.12 on ubuntu-latest PySide6 sdist	4m 23s
Python 3.10 on macos-13 PyQt5 wheel	5m 11s
Python 3.12 on macos-13 PyQt6 wheel	7m 22s
Python 3.9 on macos-13 PySide6 wheel	5m 47s
Python 3.9 on windows-latest PyQt5 wheel	4m 1s
Python 3.12 on windows-latest PyQt6 wheel	5m 26s
Python 3.10 on windows-latest PySide6 wheel	4m 56s
	45m 33s

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