chore: bump the dependencies group in /FastActivator.Tests with 1 update

Bumps the dependencies group in /FastActivator.Tests with 1 update: [Mecha.xUnit](https://github.com/JaCraig/Mecha).


Updates `Mecha.xUnit` from 2.1.41 to 2.1.42
- [Changelog](https://github.com/JaCraig/Mecha/blob/main/CHANGELOG.md)
- [Commits](JaCraig/Mecha@v2.1.41...v2.1.42)

---
updated-dependencies:
- dependency-name: Mecha.xUnit
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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

FastActivator.Tests/FastActivator.Tests.csproj

@@ -11,7 +11,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Mecha.xUnit" Version="2.1.41" />
+    <PackageReference Include="Mecha.xUnit" Version="2.1.42" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.7.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">