Upgraded pcodec to 0.2 and used new ModeSpec configuration

[mwlon]

Upgraded Pcodec to 0.2. The main API change is replacement of individual mode specs with a single spec for all modes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.82%. Comparing base (342754d) to head (876334e).
Report is 27 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #544      +/-   ##
==========================================
- Coverage   99.91%   99.82%   -0.09%     
==========================================
  Files          59       59              
  Lines        2319     2339      +20     
==========================================
+ Hits         2317     2335      +18     
- Misses          2        4       +2     

Files with missing lines	Coverage Δ
numcodecs/pcodec.py	100.00% <100.00%> (ø)
numcodecs/tests/test_pcodec.py	100.00% <100.00%> (ø)

[mwlon]

It seems the lines the coverage report is complaining about are deliberately unreachable (with correct mypy typing)

[rabernat]

Thanks for doing this @mwlon!

My suggestion should fix the coverage.

[mwlon]

Now this is confusing

[mwlon]

Oh it looks like it's failing due to unrelated changes from the merge (something zfpy). And I can't tell why ruff is complaining with this last commit... it passes locally, and the "Details" page doesn't say what file it's failing on. @rabernat @normanrz are we good to merge this?

[rabernat]

Thanks for your patience with our over-eager CI @mwlon! 🙏

Yes, you're right that #540 broke our coverage test, so we can ignore that. I wish we could fix pre-commit though. I'll see what I can do.