Add regression test for CircleHash64

[fxamacker]

Description

Add tests to check some CircleHash64 digests for compatibility.

This is a subset of the full CircleHash64 compatibility tests (which verify nearly 600,000 digests). This subset was copied from fxamacker/circlehash (Apache License 2.0).

Closes #245

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• [x] Targeted PR against main branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #247 (2953a4b) into main (82a5e53) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #247   +/-   ##
=======================================
  Coverage   68.90%   68.90%           
=======================================
  Files          14       14           
  Lines        7245     7245           
=======================================
  Hits         4992     4992           
  Misses       1621     1621           
  Partials      632      632           

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