v0.5.0

Full Changelog: v0.4.0...v0.5.0

• fix: handle extra keys in oneOf schema

• docs: update README

• fix: use typing_extensions and Union for python < 3.11

• fix: recursive schema preprocessing

• feat: make IRI properties optional but still validate them if required

• refactor: move common code to base class

• fix: handle unresolved IRIs values

• fix: correct imports for pydantic v1

• fix: empty IRI list check

• fix: implement default values for pydantic v2

• fix: default values in pydantic v1