refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="5.1.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.157" />
-    <PackageVersion Include="Polyfill" Version="8.7.4" />
+    <PackageVersion Include="Polyfill" Version="8.8.0" />
     <PackageVersion Include="System.Collections.Immutable" Version="9.0.8" />
     <PackageVersion Include="System.IO.Compression" Version="4.3.0" />
     <PackageVersion Include="Verify" Version="30.7.2" />