Get rid of partof cycles

[matentzn]

Fixes #313.

This PR ensures that we never release OBA again with subclass of cycles (as a consequence of relaxing owl:equivalentClasses).

Depends on

• [x] https://github.com/obophenotype/bio-attribute-ontology/pull/331

@rays22 can you take this PR over? It is basically done. Remaining tasks:

• [x] Help Arwa fix the above and merge into branch
• [x] Run a test release on the branch and convince yourself I did not break anything major (looking at oba.owl in Protege, maybe look at the diff - whatever you feel is necessary).

[matentzn]

THANKS! Feel free to merge, and when all other PRs are processed, create a release! Thank you so much for checking!