Pydantic-core

What's Changed
* Fix to_json function by adriangb in https://github.com/pydantic/pydantic-core/pull/577
* simplify serialization filtering by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/578
* 🙈 Add `/.pdm-python` to git ignore by lig in https://github.com/pydantic/pydantic-core/pull/579
* Assume wrap validators produce the same serialization schema by dmontagu in https://github.com/pydantic/pydantic-core/pull/573
* support `__pydantic_extra__` when serializing by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/576

New Contributors
* lig made their first contribution in https://github.com/pydantic/pydantic-core/pull/579

**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.28.0...v0.28.1

What's Changed
* remove `expect_fields_set` by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/565
* Use `__pydantic_serializer__` for serializing to JSON by dmontagu in https://github.com/pydantic/pydantic-core/pull/557
* use `LiteralString` on `PydanticCustomError` by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/562
* fix: copy with tzinfo by JeanArhancet in https://github.com/pydantic/pydantic-core/pull/567
* separate model fields validator from typed dict validator by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/568
* Error URLs by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/570
* Rework def ref system to fix various bugs by adriangb in https://github.com/pydantic/pydantic-core/pull/571

New Contributors
* JeanArhancet made their first contribution in https://github.com/pydantic/pydantic-core/pull/567

**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.27.1...v0.28.0

What's Changed
* rename `LaxOrStrictBuilder` ser variable by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/561
* install typing-extensions in emscripten runner by adriangb in https://github.com/pydantic/pydantic-core/pull/564
* Fix arguments to dataclass validation functions by adriangb in https://github.com/pydantic/pydantic-core/pull/563


**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.27.0...v0.27.1

What's Changed
* allow subclassing of `ValidationError` by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/556
* Uprev to 0.27.0 by dmontagu in https://github.com/pydantic/pydantic-core/pull/560


**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.26.0...v0.27.0

What's Changed
* allow running tests on a specific version by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/551
* Fix serialization of models with computed fields by dmontagu in https://github.com/pydantic/pydantic-core/pull/550
* Support RichComparison, hash and deepcopy for Url and MultiHostUrl by adriangb in https://github.com/pydantic/pydantic-core/pull/558
* Uprev to 0.26.0 by adriangb in https://github.com/pydantic/pydantic-core/pull/559


**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.25.0...v0.26.0

What's Changed
* Computed fields by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/547


**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.24.1...v0.25.0