refs or cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="NUnit" Version="4.6.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageVersion Include="PdfPig" Version="0.1.14" />
-    <PackageVersion Include="Polyfill" Version="10.3.0" />
+    <PackageVersion Include="Polyfill" Version="10.5.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="Verify" Version="31.16.2" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />