Nh3

What's Changed
* Bump pyo3 from 0.23.2 to 0.23.3 by dependabot in https://github.com/messense/nh3/pull/69
* Add PEP 621 project metadata to `pyproject.toml`


**Full Changelog**: https://github.com/messense/nh3/compare/v0.2.19...v0.2.20

What's Changed

* Add ALLOWED_URL_SCHEMES constant by timothymctim in https://github.com/messense/nh3/pull/55
* Add docs for ALLOWED_URL_SCHEMES by timothymctim in https://github.com/messense/nh3/pull/56
* Upgrade pyo3 to 0.23.2 by messense in https://github.com/messense/nh3/pull/65
* Build free-threaded wheels for python3.13t by messense in https://github.com/messense/nh3/pull/66

New Contributors
* timothymctim made their first contribution in https://github.com/messense/nh3/pull/55

**Full Changelog**: https://github.com/messense/nh3/compare/v0.2.18...v0.2.19

What's Changed
* Bump pyo3 from 0.21.0 to 0.21.1 by dependabot in https://github.com/messense/nh3/pull/42
* Bump pyo3 from 0.21.1 to 0.21.2 by dependabot in https://github.com/messense/nh3/pull/43
* Bump pyo3 from 0.21.2 to 0.22.0 by dependabot in https://github.com/messense/nh3/pull/46


**Full Changelog**: https://github.com/messense/nh3/compare/v0.2.17...v0.2.18

What's Changed
* Fix type for ALLOWED_ATTRIBUTES by seanbudd in https://github.com/messense/nh3/pull/35
* Improve documentation by lepture in https://github.com/messense/nh3/pull/39
* Bump ammonia from 3.3.0 to 4.0.0 by dependabot in https://github.com/messense/nh3/pull/40

New Contributors
* seanbudd made their first contribution in https://github.com/messense/nh3/pull/35
* lepture made their first contribution in https://github.com/messense/nh3/pull/39

**Full Changelog**: https://github.com/messense/nh3/compare/v0.2.15...v0.2.17

What's Changed
* Bump pyo3 from 0.19.2 to 0.20.0 by dependabot in https://github.com/messense/nh3/pull/27
* Improve README by adamchainz in https://github.com/messense/nh3/pull/30
* Improve documentation by adamchainz in https://github.com/messense/nh3/pull/31

New Contributors
* adamchainz made their first contribution in https://github.com/messense/nh3/pull/30

**Full Changelog**: https://github.com/messense/nh3/compare/v0.2.14...v0.2.15