refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -6,14 +6,14 @@
   <ItemGroup>
     <PackageVersion Include="Docnet.Core" Version="2.6.0" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="NUnit" Version="4.3.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
     <PackageVersion Include="SixLabors.ImageSharp" Version="3.1.6" />
     <PackageVersion Include="Verify" Version="28.10.1" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.ImageMagick" Version="3.6.0" />
-    <PackageVersion Include="Verify.NUnit" Version="28.10.0" />
+    <PackageVersion Include="Verify.NUnit" Version="28.10.1" />
   </ItemGroup>
 </Project>