refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -13,6 +13,6 @@
     <PackageVersion Include="ProjectDefaults" Version="1.0.162" />
     <PackageVersion Include="Polyfill" Version="8.9.1" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.NUnit" Version="31.4.3" />
+    <PackageVersion Include="Verify.NUnit" Version="31.5.3" />
   </ItemGroup>
 </Project>