Update dependencies

[bwohlberg]

• Bump maximum jaxlib/jax versions.
• Bump minimum bm3d/bm4d versions to exclude versions with problematic subnormal float handling.
• Remove warning and test related to subnormal float handling issue.
• Move bm4d to main requirements file.
• Adjust some test tolerances to account for changes in bm3d/bm4d behaviour.

Resolves recent failure of unit tests -- latest jax test in CI.

[codecov]

Codecov Report

Merging #369 (3658075) into main (2b7da48) will increase coverage by 0.08%.
The diff coverage is 97.29%.

@@            Coverage Diff             @@
##             main     #369      +/-   ##
==========================================
+ Coverage   94.10%   94.19%   +0.08%     
==========================================
  Files          57       57              
  Lines        3378     3395      +17     
==========================================
+ Hits         3179     3198      +19     
+ Misses        199      197       -2     

Flag	Coverage Δ
unittests	94.19% <97.29%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
scico/optimize/__init__.py	100.00% <ø> (ø)
scico/_autograd.py	90.90% <91.66%> (ø)
scico/denoiser.py	89.02% <100.00%> (-0.75%)	⬇️
scico/linop/__init__.py	100.00% <100.00%> (ø)
scico/linop/_util.py	100.00% <100.00%> (ø)
scico/operator/_operator.py	95.00% <100.00%> (+2.50%)	⬆️
scico/optimize/_primaldual.py	100.00% <100.00%> (ø)

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