v0.21.1rc0 — Tokenizers

What's Changed

Update dev version and pyproject.toml by @ArthurZucker in https://github.com/huggingface/tokenizers/pull/1693
Add feature flag hint to README.md, fixes #1633 by @sftse in https://github.com/huggingface/tokenizers/pull/1709
Upgrade to PyO3 0.23 by @Narsil in https://github.com/huggingface/tokenizers/pull/1708
Fixing the README. by @Narsil in https://github.com/huggingface/tokenizers/pull/1714
Fix typo in Split docstrings by @Dylan-Harden3 in https://github.com/huggingface/tokenizers/pull/1701
Fix typos by @tinyboxvk in https://github.com/huggingface/tokenizers/pull/1715
Update documentation of Rust feature by @sondalex in https://github.com/huggingface/tokenizers/pull/1711
Fix panic in DecodeStream::step due to incorrect index usage by @n0gu-furiosa in https://github.com/huggingface/tokenizers/pull/1699
Fixing the stream by removing the read_index altogether. by @Narsil in https://github.com/huggingface/tokenizers/pull/1716
Fixing NormalizedString append when normalized is empty. by @Narsil in https://github.com/huggingface/tokenizers/pull/1717
🚨 Support updating template processors by @ArthurZucker in https://github.com/huggingface/tokenizers/pull/1652
Update metadata as Python3.7 and Python3.8 support was dropped by @earlytobed in https://github.com/huggingface/tokenizers/pull/1724
Add rustls-tls feature by @torymur in https://github.com/huggingface/tokenizers/pull/1732

Full Changelog: https://github.com/huggingface/tokenizers/compare/v0.21.0...v0.21.1rc0