use ahash for hashsets, seems to be significantly quicker

[samuelcolvin]

No description provided.

[codecov]

Codecov Report

Merging #132 (072d2e0) into main (1919da1) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #132   +/-   ##
=======================================
  Coverage   97.31%   97.31%           
=======================================
  Files          40       40           
  Lines        3916     3916           
  Branches       28       28           
=======================================
  Hits         3811     3811           
  Misses        105      105           

Impacted Files	Coverage Δ
src/validators/literal.rs	95.95% <100.00%> (ø)
src/validators/typed_dict.rs	99.10% <100.00%> (ø)

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