Test Python 3.10+

[forman]

[Description of PR]

Checklist:

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/source/*
• Changes documented in CHANGES.md
• GitHub CI passes
• AppVeyor CI passes
• Test coverage remains or increases (target 100%)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.59%. Comparing base (a91bf35) to head (0ab2046).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1113   +/-   ##
=======================================
  Coverage   89.59%   89.59%           
=======================================
  Files         277      277           
  Lines       21854    21854           
=======================================
  Hits        19581    19581           
  Misses       2273     2273           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.