Fix non-contiguous non-Hermitian correlations

[mtfishman]

Summary

• Fix a typo in the lower-triangle correlation_matrix update for non-Hermitian bosonic correlations over non-contiguous site selections.
• Add regression coverage comparing a non-contiguous sites result against the corresponding full correlation matrix entries.
• Bump the patch version for the library change.

Fixes #220.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.13%. Comparing base (2523743) to head (1a9b3ec).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #221      +/-   ##
==========================================
+ Coverage   89.96%   90.13%   +0.16%     
==========================================
  Files          52       52              
  Lines        3577     3577              
==========================================
+ Hits         3218     3224       +6     
+ Misses        359      353       -6     

Flag	Coverage Δ
docs	18.14% <0.00%> (ø)

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