Bump typeconv from 1.8.0 to 2.3.1

Bumps [typeconv](https://github.com/grantila/typeconv) from 1.8.0 to 2.3.1.
- [Release notes](https://github.com/grantila/typeconv/releases)
- [Commits](grantila/typeconv@v1.8.0...v2.3.1)

---
updated-dependencies:
- dependency-name: typeconv
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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