build(deps): bump xunit from 2.6.5 to 2.6.6 (#89)

Author: dependabot[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="NetEvolve.Extensions.XUnit" Version="1.1.194" />
     <PackageVersion Include="Polyfill" Version="2.1.0" />
     <PackageVersion Include="Verify.Xunit" Version="22.11.4" />
-    <PackageVersion Include="xunit" Version="2.6.5" />
+    <PackageVersion Include="xunit" Version="2.6.6" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.6" />
     <PackageVersion Update="xunit.runner.visualstudio" Version="2.4.5" Condition=" '$(TargetFramework)' == 'net5.0' Or '$(TargetFramework)' == 'netcoreapp3.1' " />
   </ItemGroup>