Bump NUnit from 3.13.1 to 3.13.2
Bump NUnit from 3.13.1 to 3.13.2

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.1 to 3.13.2.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/v3.13.2/CHANGES.md)
- [Commits](https://github.com/nunit/nunit/compare/v3.13.1...v3.13.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
JohanLarsson/Gu.State,JohanLarsson/Gu.ChangeTracking,JohanLarsson/Gu.State