Tests and continuous integration: Fixed issues and updated CI configuration #1647

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5 sdist	11m 30s
Python 3.11 on ubuntu-latest PyQt6 wheel	8m 55s
Python 3.12 on ubuntu-latest PySide6 sdist	8m 16s
Python 3.10 on macos-13 PyQt5 wheel	13m 59s
Python 3.12 on macos-13 PyQt6 wheel	13m 37s
Python 3.9 on macos-13 PySide6 wheel	13m 9s
Python 3.9 on windows-latest PyQt5 wheel	10m 31s
Python 3.12 on windows-latest PyQt6 wheel	11m 15s
Python 3.10 on windows-latest PySide6 wheel	9m 21s
	1h 40m 33s

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