Manufacturer isn´t set correctly

[davidborzek]

Hi, firstly thanks for this great plugin.

I figured out that the manufacturer of the accessory isn't setted in the homebridge api. First of all this doesn't prevent the plugin to work. But e.g. I wanted to use the homebridge-alexa plugin and the issue prevented Alexa to find the accessories of your plugin.

I forked the repo and discovered that a additionally previous call of this
Characteristic.Manufacturer, light.manufacturername e.g. with a console.log() started to make it setted correctly. I'm not sure if it's just a problem with node environment but I tried it on several devices and node version and was faced by the same issue.