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