get_firmware_update in tb_device_mqtt.py broken after v1.10.7

[xFeanor1983x]

the get_firmware_update in tb_device_mqtt.py no longer works after v1.10.7:

__updating_thread was removed after v1.10.7

AttributeError: 'TBDeviceMqttClient' object has no attribute '_TBDeviceMqttClient__updating_thread'.

def get_firmware_update(self):
        self._client.subscribe("v2/fw/response/+")
        self.send_telemetry(self.current_firmware_info)
        self.__request_firmware_info()

        self.__updating_thread.start()