Bump FsUnit from 5.6.1 to 6.0.1

Bumps [FsUnit](https://github.com/fsprojects/FsUnit) from 5.6.1 to 6.0.1.
- [Release notes](https://github.com/fsprojects/FsUnit/releases)
- [Changelog](https://github.com/fsprojects/FsUnit/blob/master/RELEASE_NOTES.md)
- [Commits](fsprojects/FsUnit@5.6.1...6.0.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Tests/Tests.fsproj

@@ -36,9 +36,9 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="FSharp.SystemTextJson" Version="1.2.42" />
-    <PackageReference Include="FsUnit" Version="5.6.1" />
+    <PackageReference Include="FsUnit" Version="6.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.0.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Suave" Version="2.6.2" />
   </ItemGroup>