[Support] 
**Describe your problem**
plugin not working, i changed nothing, many months this plugin worked wife, but now not.

logs:

`1/7/2022, 3:04:41 PM] Error: addMembership EADDRINUSE
    at Socket.addMembership (dgram.js:850:11)
    at /usr/lib/node_modules/homebridge-shelly/node_modules/coap/lib/server.js:234:26
    at Array.forEach (<anonymous>)
    at Socket.<anonymous> (/usr/lib/node_modules/homebridge-shelly/node_modules/coap/lib/server.js:233:44)
    at Socket.onListening (dgram.js:246:7)
    at Socket.emit (events.js:400:28)
    at startListening (dgram.js:172:10)
    at dgram.js:364:7
    at processTicksAndRejections (internal/process/task_queues.js:83:21)
[1/7/2022, 3:04:41 PM] Got SIGTERM, shutting down Homebridge...`

**Describe what you have tried so far**
homebrige cannot start if plugin homebridge-shelly is enabled.

**Environment:**
 - Shelly device(s): [5x shelly 1l and 1x Shelly Dimmer 2]
 - Plugin version: [homebridge-shelly v0.19.1
 - Device running homebridge: [debian-nondocker]
 - Node.js Version: [v16.13.1]
 - Npm Version: [v8.1.2]