Property 'brightness.statusPattern' was given in an unsupported type. Using the default one!

Describe the bug When using a configuration without any statusPattern, the warning Property 'brightness.statusPattern' was given in an unsupported type. Using the default one! is given.

Expected behavior No warning message

To Reproduce Steps to reproduce the behavior: Use the configuration from https://www.npmjs.com/package/homebridge-http-lightbulb#basic-light-bulb-with-power-and-brightness

Version

homebridge: 1.2.3
homebridge-http-lightbulb: 1.2.1

Configuration

{
  "accessory": "HTTP-LIGHTBULB",
  "name": "Light",

  "onUrl": "http://localhost/api/lightOn",
  "offUrl": "http://localhost/api/lightOff",
  "statusUrl": "http://localhost/api/lightStatus",

  "brightness": {
    "setUrl": "http://localhost/api/setBrightness?brightness=%s",
    "statusUrl": "http://localhost/api/getBrightness"
  }
}

Possible fix It looks like this line is wrong, https://github.com/Supereg/homebridge-http-lightbulb/blob/master/index.js#L351, Shouldn't be if (config.brightness.statusPattern) ?

Supereg / homebridge-http-lightbulb

Property 'brightness.statusPattern' was given in an unsupported type. Using the default one! #11