Added missing references to test projects

Author: Sergio0694

Microsoft.Toolkit.Uwp.UI.Animations/Builders/AnimationBuilder.Factories.cs

@@ -238,7 +238,7 @@ private TValue GetToAs<TValue>()
                 // IL_000b: unbox.any !!TValue
                 // IL_0010: ret
                 // =============================
-                // The key value is that the JIT (and AOT compilers such as .NET Native) can recognize this
+                // The key point is that the JIT (and AOT compilers such as .NET Native) can recognize this
                 // pattern and optimize the boxing away in case the types match. This is the case whenever
                 // the generic arguments are value types, which due to generic types in .NET being reified
                 // results in a completely different generic instantiation of the same method, making the

UnitTests/UnitTests.NetCore/UnitTests.NetCore.csproj

@@ -20,6 +20,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\Microsoft.Toolkit.Diagnostics\Microsoft.Toolkit.Diagnostics.csproj" />
     <ProjectReference Include="..\..\Microsoft.Toolkit.Mvvm\Microsoft.Toolkit.Mvvm.csproj" />
     <ProjectReference Include="..\..\Microsoft.Toolkit\Microsoft.Toolkit.csproj" />
   </ItemGroup>

UnitTests/UnitTests.UWP/UnitTests.UWP.csproj

@@ -232,6 +232,10 @@
     <Content Include="Assets\Wide310x150Logo.scale-200.png" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\Microsoft.Toolkit.Diagnostics\Microsoft.Toolkit.Diagnostics.csproj">
+      <Project>{76f89522-ca28-458d-801d-947ab033a758}</Project>
+      <Name>Microsoft.Toolkit.Diagnostics</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\Microsoft.Toolkit.Mvvm\Microsoft.Toolkit.Mvvm.csproj">
       <Project>{d82ae6e1-e612-434e-acb2-363ee48738d3}</Project>
       <Name>Microsoft.Toolkit.Mvvm</Name>