Tests and continuous integration: Fixed issues and updated CI configuration #1644

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5 sdist	10m 21s
Python 3.11 on ubuntu-latest PyQt6 wheel	8m 37s
Python 3.12 on ubuntu-latest PySide6 sdist	8m 3s
Python 3.10 on macos-13 PyQt5 wheel	11m 22s
Python 3.12 on macos-13 PyQt6 wheel	16m 54s
Python 3.9 on macos-13 PySide6 wheel	13m 15s
Python 3.9 on windows-latest PyQt5 wheel	10m 45s
Python 3.12 on windows-latest PyQt6 wheel	10m 51s
Python 3.10 on windows-latest PySide6 wheel	9m 36s
	1h 39m 44s

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