FIX beam_width upper bound

[MatthewSZhang]

Checklist

• Used a personal fork to propose changes
• A reference to a related issue: BUG correct beam_width upper bound #192
• A description of the changes: change the beam_width upper bound to n_features - n_exclusions - n_inclusions

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (085a225) to head (3ab69fa).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #193   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines          685       687    +2     
=========================================
+ Hits           685       687    +2     

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