Upgrade packages

Author: Muhammad Rehan Saeed

Source/Schema.NET/Schema.NET.csproj

@@ -44,7 +44,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" PrivateAssets="all" Version="2.9.3" />
     <!-- See https://github.com/Microsoft/dotnet/tree/master/releases/reference-assemblies -->
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" PrivateAssets="All" Version="1.0.0-preview.2" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" PrivateAssets="All" Version="1.0.0-beta2-19270-01" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" PrivateAssets="All" Version="1.0.0-beta2-19324-01" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
     <PackageReference Include="StyleCop.Analyzers" PrivateAssets="All" Version="1.1.118" />
   </ItemGroup>

Tests/Schema.NET.Test/Schema.NET.Test.csproj

@@ -12,7 +12,7 @@
   </ItemGroup>
 
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.1.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="Moq" Version="4.12.0" />
     <PackageReference Include="StyleCop.Analyzers" PrivateAssets="all" Version="1.1.118" />
     <PackageReference Include="xunit" Version="2.4.1" />