refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -11,7 +11,7 @@
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.4" />
     <PackageVersion Include="NodaTime" Version="3.3.2" />
-    <PackageVersion Include="Polyfill" Version="10.7.1" />
+    <PackageVersion Include="Polyfill" Version="10.8.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="ProjectFiles" Version="1.2.0" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" Pinned="true" />