Dev #623 testing

[aleneum]

Fix failing GHA, update tested Python versions and add common .venv to the ignored folders.

Contributed by @ipeluffo.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06% 🎉

Comparison is base (f3e01de) 98.25% compared to head (8a3811b) 98.31%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #632      +/-   ##
==========================================
+ Coverage   98.25%   98.31%   +0.06%     
==========================================
  Files          13       13              
  Lines        2580     2557      -23     
==========================================
- Hits         2535     2514      -21     
+ Misses         45       43       -2     

Files Changed	Coverage Δ
transitions/extensions/__init__.py	100.00% <ø> (ø)
transitions/extensions/locking.py	100.00% <ø> (ø)
transitions/extensions/markup.py	99.34% <ø> (-0.02%)	⬇️
transitions/core.py	100.00% <100.00%> (ø)
transitions/extensions/factory.py	94.73% <100.00%> (+4.03%)	⬆️
transitions/extensions/nesting.py	99.29% <100.00%> (-0.01%)	⬇️

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