Bump MSTest from 3.4.3 to 3.5.0

Bumps [MSTest](https://github.com/microsoft/testfx) from 3.4.3 to 3.5.0.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.4.3...v3.5.0)

---
updated-dependencies:
- dependency-name: MSTest
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Sep.Test/Sep.Test.csproj

@@ -20,7 +20,7 @@
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
  </PackageReference>
  <PackageReference Include="PublicApiGenerator" Version="11.1.0" />
- <PackageReference Include="MSTest" Version="3.4.3" />
+ <PackageReference Include="MSTest" Version="3.5.0" />
  </ItemGroup>
 
 </Project>