[Support] Shelly Button 1
**Describe your problem**
I wanted to add my Shelly Button 1 to Homebridge and using it in Homekit Automations. The Device is registered by the Plugin but it doesn't appear in Homekit.

**Describe what you have tried so far**
Well I added it several times, removed it from Cache but nothing changed. Using different mDNS Advertisers but it doesn't appear in Homekit. Even the Debug Mode didn't helped me to find a solution.

**Environment:**
 - Shelly device(s): Shelly Button 1 (SHBTN-2)
 - Plugin version: v0.19.1
 - Device running homebridge: Docker container on Raspberry Pi 4
