refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -11,7 +11,7 @@
     <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.DiffPlex" Version="3.1.2" />
+    <PackageVersion Include="Verify.DiffPlex" Version="3.2.0" />
     <PackageVersion Include="Verify.NUnit" Version="31.18.0" />
     <PackageVersion Include="NUnit" Version="4.6.1" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />