Bump xunit from 2.4.1 to 2.7.0

Bumps [xunit](https://github.com/xunit/xunit) from 2.4.1 to 2.7.0.
- [Commits](xunit/xunit@2.4.1...2.7.0)

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

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

test/Tests/Tests.csproj

@@ -18,7 +18,7 @@
         <PackageReference Include="Duende.IdentityServer" Version="$(IdentityServerVersion)" />
 
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
-        <PackageReference Include="xunit" Version="2.4.1" />
+        <PackageReference Include="xunit" Version="2.7.0" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>