Bump ujson from 4.2.0 to 5.1.0 (#196)

Bump ujson from 4.2.0 to 5.1.0 (#196)

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 4.2.0 to 5.1.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](https://github.com/ultrajson/ultrajson/compare/4.2.0...5.1.0)

---
updated-dependencies:
- dependency-name: ujson
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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