chore: vec to hashset

[ilteoood]

Hi Luciano,
most of the operations you do with claims and algorithms are just contains.

I think that moving to an HashSet will make these operations faster.
Since you are building a benchmark for this project, it could be worth a try 😄

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.89%. Comparing base (efbac0c) to head (4b0955a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #15      +/-   ##
==========================================
+ Coverage   90.87%   90.89%   +0.01%     
==========================================
  Files           9        9              
  Lines         921      923       +2     
==========================================
+ Hits          837      839       +2     
  Misses         84       84              

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[lmammino]

for small sets BTreeSets might be faster but until we have some microbenchmarks I think this is still an awesome improvements! :) thanks a lot