refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="NUnit" Version="4.5.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="5.2.0" Pinned="true" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.172" />
-    <PackageVersion Include="Polyfill" Version="9.10.0" />
+    <PackageVersion Include="Polyfill" Version="9.11.0" />
     <PackageVersion Include="ProjectFiles" Version="0.5.0" />
     <PackageVersion Include="Verify" Version="31.13.2" />
     <PackageVersion Include="Verify.NUnit" Version="31.13.2" />