Update V2.1.0 problem arises
Hi,

Great update to V2.1.0. However there is some issue after upgrading that causes the plugin not to work. 

After upgrading using sudo npm -g update homebridge-hs100

The plugin stop working due to plug.js from the hs100 API 
`this.supportsConsumption = (sysInfo.feature.includes('ENE'));`

I went to lib/plug.js to remove that line, this.emitevents() and corresponding functions that uses supports consumption and it works. 
