chore: add tests against 3.0

[thinkingserious]

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license

[codecov[bot]]

Codecov Report

Merging #125 (01338fe) into main (7fc014a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #125   +/-   ##
=======================================
  Coverage   95.75%   95.75%           
=======================================
  Files           2        2           
  Lines         353      353           
=======================================
  Hits          338      338           
  Misses         15       15           

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