Bump Newtonsoft.Json

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 6.0.5 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@6.0.5...13.0.1)

---
updated-dependencies:
- dependency-name: Newtonsoft.Json
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tests/TestData/SmokeTests.WebLibraryNetFxBaseline/SmokeTests.WebLibraryNetFxBaseline.csproj

@@ -18,6 +18,6 @@
     <PackageReference Include="Microsoft.AspNet.Razor" Version="3.2.7" />
     <PackageReference Include="Microsoft.AspNet.WebPages" Version="3.2.7" />
     <PackageReference Include="Microsoft.Web.Infrastructure" Version="1.0.0.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="6.0.5" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 </Project>