Updated Json.Net version

Author: ajaybhargavb

src/dotnet-razor-tooling/project.json

@@ -19,7 +19,7 @@
         "Microsoft.AspNetCore.Razor.Runtime": "1.0.0-*",
         "Microsoft.DotNet.ProjectModel.Loader": "1.0.0-*",
         "Microsoft.Extensions.CommandLineUtils": "1.0.0-*",
-        "Newtonsoft.Json": "8.0.2",
+        "Newtonsoft.Json": "8.0.3",
         "System.Runtime.Serialization.Primitives": "4.1.0-*",
         "NETStandard.Library": "1.0.0-*",
         "Microsoft.NETCore.Platforms": "1.0.1-*"