update dependencies

Author: Gábor Zavarkó

Shuttle.Core.Serialization.Tests/Shuttle.Core.Serialization.Tests.csproj

@@ -5,8 +5,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
-    <PackageReference Include="NUnit" Version="3.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
+    <PackageReference Include="NUnit" Version="3.13.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
   </ItemGroup>