Switch from nose to pytest

[audiodude]

Fixes #588

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (525b822) 96.34% compared to head (02ec18c) 96.20%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #670      +/-   ##
==========================================
- Coverage   96.34%   96.20%   -0.14%     
==========================================
  Files         100      100              
  Lines        7831     7832       +1     
==========================================
- Hits         7545     7535      -10     
- Misses        286      297      +11     

Files	Coverage Δ
wp1/logic/project_test.py	99.03% <100.00%> (+<0.01%)	⬆️

... and 2 files with indirect coverage changes

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