refs and cleanup

Author: SimonCropp

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.1" />
     <PackageVersion Include="Npgsql" Version="9.0.2" />
     <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
-    <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" />