refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -4,15 +4,15 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.2.0" />
+    <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.3.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
-    <PackageVersion Include="Polyfill" Version="10.7.0" />
+    <PackageVersion Include="Polyfill" Version="10.7.1" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="TestableIO.System.IO.Abstractions" Version="22.1.1" />
     <PackageVersion Include="TestableIO.System.IO.Abstractions.Wrappers" Version="22.1.1" />
-    <PackageVersion Include="Verify" Version="31.18.0" />
+    <PackageVersion Include="Verify" Version="31.19.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.2.0" />
-    <PackageVersion Include="Verify.NUnit" Version="31.18.0" />
+    <PackageVersion Include="Verify.NUnit" Version="31.19.0" />
     <PackageVersion Include="NUnit" Version="4.6.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />