up pytest to 9.0.2

[even-even]

Hello
In this PR:

1. up pytest 8.4.2 -> 9.0.2
2. add https://docs.pytest.org/en/stable/reference/reference.html#cmdoption-color pytest option
3. fix some typos in tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.91%. Comparing base (35e7b4a) to head (79a85d7).
⚠️ Report is 18 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #254      +/-   ##
==========================================
- Coverage   84.27%   81.91%   -2.37%     
==========================================
  Files           6        6              
  Lines         229      271      +42     
  Branches       47       56       +9     
==========================================
+ Hits          193      222      +29     
- Misses         23       31       +8     
- Partials       13       18       +5     

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