Removed Core and Shared references for all UnitTest projects

Author: dahall

Diff for: UnitTests/Directory.Build.targets

@@ -13,13 +13,11 @@
     <SupportedPlatform Include="windows" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="NUnit" Version="4.3.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="$(MSBuildThisFileDirectory)..\Core\Vanara.Core.csproj" />
-    <ProjectReference Include="$(MSBuildThisFileDirectory)..\PInvoke\Shared\Vanara.PInvoke.Shared.csproj" />
     <ProjectReference Condition="!$(MSBuildProjectDirectory.EndsWith('CSharpRunner'))" Include="$(MSBuildThisFileDirectory)CSharpRunner\Shared.csproj" />
   </ItemGroup>
 </Project>