v0.6.1

What's Changed

Fix some issues with the v0.6.0 release:

• Some type hints that don't work on Python 3.8 got through, fix them.
• PySide6==6.6.3.1 lead to a Mypy error, exclude it.
• Remove the unused Scipy requirement.

Full Changelog: v0.6.0...v0.6.1