Tests and continuous integration: Fixed issues and updated CI configuration #1642

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5 sdist	9m 59s
Python 3.11 on ubuntu-latest PyQt6 wheel	9m 28s
Python 3.12 on ubuntu-latest PySide6 sdist	5m 29s
Python 3.10 on macos-13 PyQt5 wheel	16m 20s
Python 3.12 on macos-13 PyQt6 wheel	14m 28s
Python 3.9 on macos-13 PySide6 wheel	7m 48s
Python 3.9 on windows-latest PyQt5 wheel	11m 12s
Python 3.12 on windows-latest PyQt6 wheel	10m 21s
Python 3.10 on windows-latest PySide6 wheel	9m 41s
	1h 34m 46s

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