What's Changed
* Upgrade maturin to 0.15 by messense in https://github.com/pydantic/pydantic-core/pull/621
* Int validation performance improvement by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/620
* cleanup string validation a little by samuelcolvin in https://github.com/pydantic/pydantic-core/pull/624
* Support negative indices in serializer include/exclude by adriangb in https://github.com/pydantic/pydantic-core/pull/627
* Bump version to 0.34.0 by adriangb in https://github.com/pydantic/pydantic-core/pull/631
**Full Changelog**: https://github.com/pydantic/pydantic-core/compare/v0.33.0...v0.34.0