Pykm3-codec

**Full Changelog**: https://github.com/FrogCosmonaut/pykm3-codec/compare/v0.5.0...v0.5.1

- Removed automatic language detection
- Added slots to map and codec classes, + singleton instances
- Added benchmarks
- Migrated tests from unittest to pytest

What's Changed
* Version release: v0.5.0 by FrogCosmonaut in https://github.com/FrogCosmonaut/pykm3-codec/pull/1

New Contributors
* FrogCosmonaut made their first contribution in https://github.com/FrogCosmonaut/pykm3-codec/pull/1

**Full Changelog**: https://github.com/FrogCosmonaut/pykm3-codec/commits/v0.5.0