Upgrade xunit packages to latest versions

Author: mjbond-msft

test/Xamarin.VSSDK.Tests/Xamarin.VSSDK.Tests.csproj

@@ -72,8 +72,11 @@
     <PackageReference Include="MSBuilder.ThisAssembly.Project" Version="0.3.4" />
     <PackageReference Include="InjectModuleInitializer" Version="2.0.0" />
     <PackageReference Include="Mvp.Xml" Version="2.3.0" />
-    <PackageReference Include="xunit" Version="2.4.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="xunit.vsix" Version="0.3.12-beta" />
     <PackageReference Include="Microsoft.Build" Version="16.10.0" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="16.10.0" ExcludeAssets="runtime" />