refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -21,7 +21,7 @@
     <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="10.0.5" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.5" />
     <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="10.0.5" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="Microsoft.Sbom.Targets" Version="4.1.5" />
     <PackageVersion Include="Polyfill" Version="10.0.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.172" />