build(deps): Bump xunit.extensibility.execution from 2.6.6 to 2.7.0

Bumps [xunit.extensibility.execution](https://github.com/xunit/xunit) from 2.6.6 to 2.7.0.
- [Commits](xunit/xunit@2.6.6...2.7.0)

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

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

Author: dependabot[bot]

tests/bunit.testassets/bunit.testassets.csproj

@@ -16,7 +16,7 @@
 	<ItemGroup>
 		<PackageReference Include="Serilog" Version="3.1.1" />
 		<PackageReference Include="Serilog.Expressions" Version="4.0.0" />
-		<PackageReference Include="xunit.extensibility.execution" Version="2.6.6" />
+		<PackageReference Include="xunit.extensibility.execution" Version="2.7.0" />
 		<PackageReference Include="xunit.abstractions" Version="2.0.3" />		
 		<PackageReference Include="xunit.assert" Version="2.7.0" />
 	</ItemGroup>