Fix #110 - enable asynchronous mode for Stream transport on Windows

Author: SteveSandersonMS

src/Microsoft.AspNetCore.NodeServices/HostingModels/PhysicalConnections/NamedPipeConnection.cs

@@ -12,12 +12,18 @@ internal class NamedPipeConnection : StreamConnection
 #pragma warning disable 1998 // Because in the NET451 code path, there's nothing to await
         public override async Task<Stream> Open(string address)
         {
-            _namedPipeClientStream = new NamedPipeClientStream(".", address, PipeDirection.InOut);
+            _namedPipeClientStream = new NamedPipeClientStream(
+                ".",
+                address,
+                PipeDirection.InOut,
+                PipeOptions.Asynchronous);
+
 #if NET451
             _namedPipeClientStream.Connect();
 #else
             await _namedPipeClientStream.ConnectAsync().ConfigureAwait(false);
 #endif
+
             return _namedPipeClientStream;
         }
 #pragma warning restore 1998