Add tests for v3.6 and update old tests#37

Merged

andrew-s28 merged 1 commit intopyCOARE:mainfrom

andrew-s28:coare-36-tests

Mar 21, 2025

Commits on Mar 21, 2025

adds tests for coare_36 and restructures testing library, drops 3.8 support, and adds tests for 3.12 and 3.13
andrew-s28
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