[Bug] Shelly 1L doesn't expose 2nd button in Homebridge
 When I am adding Shelly1L with 2 buttons, one in Toggle mode and one in Detached mode, i don't see the 2nd button exposed in Homebridge.  
Could you please help me understand how i can expose the both buttons ?
That's the config 
{
            "name": "ShellyBridge",
            "admin": {
                "enabled": true
            },
            "networkInterface": "192.168.1.114",
            "devices": [
                
                {
                    "id": "8CAAB55DDC49",
                    "name": "KitchenLight",
                    "type": "switch"
                }
            ],
            "_bridge": {
                "username": "0E:4A:1E:EE:35:C8",
                "port": 32928
            },
            "platform": "Shelly"
        },

**Log output**
6/15/2022, 3:31:31 PM] Registering platform 'homebridge-shelly.Shelly'
[6/15/2022, 3:31:31 PM] [ShellyBridge] Loaded homebridge-shelly v0.19.1 child bridge successfully
[6/15/2022, 3:31:31 PM] Loaded 3 cached accessories from cachedAccessories.0E4A1EEE35C8.
[6/15/2022, 3:31:31 PM] [ShellyBridge] 3 accessories loaded from cache
[6/15/2022, 3:31:31 PM] Homebridge v1.4.1 (HAP v0.10.2) (ShellyBridge) is running on port 32928.

**Environment:**
 - Shelly device(s): Shelly 1L
 - Plugin version: v0.19.1
 - Device running homebridge: MacOS Monterey
