refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -8,11 +8,11 @@
     <PackageVersion Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="OpenMcdf" Version="2.4.1" />
-    <PackageVersion Include="Polyfill" Version="7.27.0" />
+    <PackageVersion Include="Polyfill" Version="7.30.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.150" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.XunitV3" Version="30.0.0" />
-    <PackageVersion Include="xunit.v3" Version="2.0.1" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.2" />
+    <PackageVersion Include="xunit.v3" Version="2.0.2" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.0" />
   </ItemGroup>
 </Project>