Officially support 3.10

[g-as]

I guess merging #816 would be nice. I can rebase once it's done, and update the python matrix.

All Submissions:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you added an explanation of what problem you are trying to solve with this PR?
• Have you added information on what your changes do and why you chose this as your solution?
• Have you written new tests for your changes?
• Does your submission pass tests?
• This project follows PEP8 style guide. Have you run your code against the 'flake8' linter?

[peppelinux]

ok @g-as, you use py3.10, got it!
😄

[g-as]

hahaha, not yet, but i'd like to

[g-as]

🥳