[python] Use somacore 1.0.14

[johnkerl]

For

• https://github.com/single-cell-data/SOMA/releases/tag/python-v1.0.14
• Fix typo where var should be checked instead of obs SOMA#208
• Correct category dtype check in ExperimentAxisQuery SOMA#209

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.77%. Comparing base (02e6b28) to head (f2878a8).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2878      +/-   ##
==========================================
+ Coverage   89.62%   89.77%   +0.15%     
==========================================
  Files          37       37              
  Lines        3961     3961              
==========================================
+ Hits         3550     3556       +6     
+ Misses        411      405       -6     

Flag	Coverage Δ
python	89.77% <ø> (+0.15%)	⬆️

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

Components	Coverage Δ
python_api	89.77% <ø> (+0.15%)	⬆️
libtiledbsoma	∅ <ø> (∅)