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* Define subject and/or object on several associations by kevinschaper in https://github.com/biolink/biolink-model/pull/997
* Replace recursive category range on NamedThing with regex by kevinschaper in https://github.com/biolink/biolink-model/pull/998
* fixes 1002 - remove underscores from some model components by sierra-moxon in https://github.com/biolink/biolink-model/pull/1004
* fixes 937 - deprecate approved_to_treat in favor of worldwide FDA status slot. by sierra-moxon in https://github.com/biolink/biolink-model/pull/1005
* add xref to named thing, fixes 934 by sierra-moxon in https://github.com/biolink/biolink-model/pull/1006
* move around SEMMED mappings according to 936, fixes 936 fixes 935 by sierra-moxon in https://github.com/biolink/biolink-model/pull/1007
* remove relation from association fixes 922 by sierra-moxon in https://github.com/biolink/biolink-model/pull/1009
* add remaining inverses fixes 831 by sierra-moxon in https://github.com/biolink/biolink-model/pull/1010
* Fix prefix mismatches by sierra-moxon in https://github.com/biolink/biolink-model/pull/1011
**Full Changelog**: https://github.com/biolink/biolink-model/compare/v2.2.16...v2.3.0