Openapi-core

Changelog
* validators public api expose 455
* allow openapi-schema-validator 0.4 458

Changelog
* better unmarshaller finders with refactor 447

Changelog
* werkzeug flask root path fix 449
* additionalProperties without schema should allow null. 444

Changelog
* Add NullUnmarshaller 432
* Multi type unmarshaller 433
* Unmarshaller format refactor 434

Changelog
* lists as additional properties fix 429
* x-model extension optional 431

Changelog
* Switch to jsonschema-spec 416
* Use auto-detect validator proxy 418
* OpenAPI 3.1 support + Auto-detect proxies and request / response validator protocols 419
* Add py.typed to mark package as supporting typing 420
* Refuse to cast str or bytes to array 421
* x-model extension import model class 422
* Add deepObject support 379
* Add anyOf support 423
* Separate werkzeug support 426
* Starlette support 427