Shelly i3 doesn't change name set on config
Hi!
I've bought some Shelly i3, everything ok but I can't set their name from config.plist file.


```
"devices": [
                {
                    "id": "XXXXXXXXXXXX",     // Shelly Dimmer 2 - Changes
                    "name": "Albero di Natale"
                },
                {
                    "id": "XXXXXXXXXXXX",      // Shelly i3 - Doesn't change
                    "name": "Deviatori"
                },
                {
                    "id": "XXXXXXXXXXXX",
                    "name": "Deviatori"
                }
            ]
```

**Environment:**
 - Shelly device(s): Shelly i3 [20201124-092930/v1.9.0@57ac4ad8]
 - Plugin version: 0.16.0
 - Device running homebridge: Linux raspberrypi 5.4.79-v7l+

P.S: could you update your read.me file saying it's not possible to edit Shelly Dimmer 2 type?

Thanks
Andrea Pellegrin
