Update ZWaveNode.UpdateFirmware method so that its returned result contains the NodeFirmwareUpdateResultArgs (#59)

Author: spudwebb

Visual Studio Projects/ZWaveJS.NET/ZWaveJS.NET/ZWaveNode.cs

@@ -263,6 +263,10 @@ public Task<CMDResult> UpdateFirmware(FirmwareUpdate[] Updates)
             Driver.Instance.Callbacks.Add(ID, (JO) =>
             {
                 CMDResult Res = new CMDResult(JO);
+                if(JO.ContainsKey("result"))
+                {
+                    Res.SetPayload(JO.SelectToken("result.result").ToObject<NodeFirmwareUpdateResultArgs>());
+                }
                 Result.SetResult(Res);
             });