Bump Newtonsoft.Json from 9.0.1 to 13.0.1 in /src/Mvc/Mvc#13

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dependabot/nuget/src/Mvc/Mvc/Newtonsoft.Json-13.0.1ServiceStack/Test:dependabot/nuget/src/Mvc/Mvc/Newtonsoft.Json-13.0.1Copy head branch name to clipboard