chore: add tests against 3.0

[thinkingserious]

Checklist

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.75%. Comparing base (7fc014a) to head (01338fe).
⚠️ Report is 23 commits behind head on main.

Additional details and impacted files

@@ 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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