Updates are not iterable.
Using homebridge, just has produced this error:
```
[4/9/2020, 21:05:20] TypeError: updates is not iterable
Apr 09 21:05:20 homebridge homebridge[2206]:     at Shelly1PM._applyUpdate (/usr/lib/node_modules/homebridge-shelly/node_modules/shellies/lib/device.js:203:25)
Apr 09 21:05:20 homebridge homebridge[2206]:     at Shelly1PM.update (/usr/lib/node_modules/homebridge-shelly/node_modules/shellies/lib/device.js:193:10)
Apr 09 21:05:20 homebridge homebridge[2206]:     at Shellies._statusUpdateHandler (/usr/lib/node_modules/homebridge-shelly/node_modules/shellies/index.js:41:14)
Apr 09 21:05:20 homebridge homebridge[2206]:     at StatusUpdatesListener.emit (/usr/lib/node_modules/homebridge-shelly/node_modules/eventemitter3/index.js:181:35)
Apr 09 21:05:20 homebridge homebridge[2206]:     at handler (/usr/lib/node_modules/homebridge-shelly/node_modules/shellies/lib/status-updates-listener.js:22:37)
Apr 09 21:05:20 homebridge homebridge[2206]:     at OutgoingMessage.<anonymous> (/usr/lib/node_modules/homebridge-shelly/node_modules/shellies/lib/coap/index.js:50:11)
Apr 09 21:05:20 homebridge homebridge[2206]:     at OutgoingMessage.emit (events.js:323:22)
Apr 09 21:05:20 homebridge homebridge[2206]:     at Agent.handle [as _handle] (/usr/lib/node_modules/homebridge-shelly/node_modules/coap/lib/agent.js:274:7)
Apr 09 21:05:20 homebridge homebridge[2206]:     at Socket.<anonymous> (/usr/lib/node_modules/homebridge-shelly/node_modules/coap/lib/agent.js:84:10)
Apr 09 21:05:20 homebridge homebridge[2206]:     at Socket.emit (events.js:311:20)
```