Bioontologies

**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.4.2...v0.4.3

**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.4.1...v0.4.2

What's Changed
* Improve availability check by cthoyt in https://github.com/biopragmatics/bioontologies/pull/15


**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.4.0...v0.4.1

What's Changed
* Support pydantic1/2 by cthoyt in https://github.com/biopragmatics/bioontologies/pull/14


**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.3.1...v0.4.0

What's Changed
* Drop py37 by cthoyt in https://github.com/biopragmatics/bioontologies/pull/13


**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.3.0...v0.3.1

**Full Changelog**: https://github.com/biopragmatics/bioontologies/compare/v0.2.5...v0.3.0

Lots of changes to the OBO Graph data model to support standardizing content. Maybe in hindsight this will have been a bad idea and it would be better to make a totally separate data model for cleaned/standardized content.