Bump the tests group with 2 updates

Bumps the tests group with 2 updates: [xunit](https://github.com/xunit/xunit) and [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit).


Updates `xunit` from 2.4.2 to 2.5.0
- [Commits](xunit/xunit@2.4.2...2.5.0)

Updates `xunit.runner.visualstudio` from 2.4.5 to 2.5.0
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@v2.4.5...2.5.0)

---
updated-dependencies:
- dependency-name: xunit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tests
- dependency-name: xunit.runner.visualstudio
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tests
...

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

src/ThisAssembly.Tests/ThisAssembly.Tests.csproj

@@ -39,8 +39,8 @@
     <PackageReference Include="PolySharp" Version="1.13.2" PrivateAssets="All" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" Pack="false" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
-    <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />
+    <PackageReference Include="xunit" Version="2.5.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" />
     <!-- Only needed because we're referencing via P2P and not getting the dependency -->
     <PackageReference Include="Devlooped.SponsorLink" Version="1.0.0" />
   </ItemGroup>