refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="Shipwreck.Phash.Bitmaps" Version="0.5.0" />
     <PackageVersion Include="System.Drawing.Common" Version="10.0.8" />
     <PackageVersion Include="Verify" Version="31.18.0" />
-    <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
+    <PackageVersion Include="Verify.DiffPlex" Version="3.2.0" />
     <PackageVersion Include="Verify.NUnit" Version="31.18.0" />
     <PackageVersion Include="Verify.Phash" Version="3.1.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />