Bump xunit from 2.6.4 to 2.7.0 (#535)

Bumps [xunit](https://github.com/xunit/xunit) from 2.6.4 to 2.7.0.
- [Commits](xunit/xunit@2.6.4...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -22,7 +22,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageVersion Include="MSBuild.ProjectCreation" Version="10.0.0" />
     <PackageVersion Include="Shouldly" Version="4.2.1" />
-    <PackageVersion Include="xunit" Version="2.6.4" />
+    <PackageVersion Include="xunit" Version="2.7.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.4.5" />
   </ItemGroup>
   <ItemGroup>