[Feature request] Support for homebrdige 2.0
**Is your feature request related to a problem? Please describe.**
Homebridge 2.0 is coming and may affect some plugins, check if Shelly plugin is impacted 

**Describe the solution you'd like**
[Homebridge 2 changes explained](https://github.com/homebridge/homebridge/wiki/Updating-To-Homebridge-v2.0)
