Backport to Python 3.8 for Windows 7 users

[Poikilos]

• Match statements are changed to if-elif-else
  • in (some_value, some_other_value) is used to match against multiple values (instead of match's context-specific parsing of | which is used as binary when not in a match scope)
• Python version requirement in pyproject is changed from >= 3.10 to >= 3.8
• May work on earlier versions of Python.
• May work on earlier versions of Windows such as Vista (not tested).
  • However, Python 3.7 backport to XP may have "problems with some Internet stuff" (https://retrosystemsrevival.blogspot.com/2021/01/python-371-for-windows-xp.html).

[bobjacobsen]

Looks good!

GitHub claims there's a conflict here, but I don't see it. Could you merge the current contents of the main branch to your PR branch to see if that resolves it? Thanks.