Segfaulting tests on PyQt6 + Windows on both Py3.7 and 3.10 (no conda) probably due to PyQt 6.3.0

[dalthviz]

Looks like the tests started segfaulting on PyQt6 + Windows on both Py3.7 and 3.10 (no conda). Based on the check logs, it seems likely this is due to the PyQt PyPI wheels for Qt 6.3.0 being released; any idea on fixing this from our end, or should we pin to qt 6.2.x for now?

Originally posted by @CAM-Gerlach in #334 (comment)

[dalthviz]

Seems like we where installing PyQt6 6.2.3 with PyQt6-Qt6 6.3.0 so a DLL error was being raised.

[CAM-Gerlach]

Ah, I thought that was supported like it is with e.g. PySide on conda, but evidently not, and presumably for whatever reason PyQt doesn't constrain PyQt-Qt to a compatible version (which it should, especially if it causes a segfault)...