"How to: use Node.js built-in modules" example does not work using version 5.9.1

[PMudra]

I tried to execute the "How to: use Node.js built-in modules" of the Readme.md page. It did not work with the version 5.9.1 of edge.js.

class Program
  {
    public static async Task Start()
    {
      var createHttpServer = Edge.Func(@"
        var http = require('http');

        return function (port, cb) {

          var server = http.createServer(function (req, res) {
            res.end('Hello, world! ' + new Date());
          });

          server.listen(port, function(error) {
            cb(error, 'hello');
          });
        };");

      object o = await createHttpServer(9999);
      Console.WriteLine(o);
      Console.ReadKey();
      //Console.WriteLine(await new WebClient().DownloadStringTaskAsync("http://localhost:9999"));
    }

    static void Main(string[] args)
    {
      Start().Wait();
    }
  }

The callback was never called I belief, so the await never returned. The same code worked fine when I used the version 4.4.1 of edge.js. This might also be a bug of node.js itself(?)