feat: add offset support to binary logistic regression, #431

[espenloov]

#431

Adds an optional offset parameter (standard None) to logistic regression, not learned.

[codecov]

Codecov Report

❌ Patch coverage is 96.42857% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 77.93%. Comparing base (070c028) to head (24bbfd8).

Files with missing lines	Patch %	Lines
algorithms/linfa-logistic/src/hyperparams.rs	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #435      +/-   ##
==========================================
+ Coverage   77.90%   77.93%   +0.03%     
==========================================
  Files         104      104              
  Lines        7523     7547      +24     
==========================================
+ Hits         5861     5882      +21     
- Misses       1662     1665       +3     

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