Updated Python versions and GitHub actions

[egonw]

Description

Updates Python versions to be tested against. And updates also GitHub Actions.

If you make changes to the Python code

• My code passes the tox check, I can receive warnings about tests, documentation or both

Checklist

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have not used code from external sources without attribution
• I have considered accessibility in my implementation
• There are no remaining debug statements (print, console.log, ...)