[Bug] Can't add Shelly Flood to homebridge-shelly
**Describe the bug**
Can't add Shelly Flood to homebridge. I have a working Shelly 1 within my homebridge environment and it shows up correctly in Homekit. When adding a Shelly Flood, it does not show up/is not recognized at all. There is no activity in the Shelly Flood's Logfile. 

Configuration:
```
{
            "name": "Shelly",
            "admin": {
                "enabled": true
            },
            "devices": [
                {
                    "id": "F4CFA2ED63A5",
                    "name": "Kammer",
                    "type": "whiteLightbulb"
                },
                {
                    "id": "ABEEA2",          //tried with different variations, also full MAC address
                    "name": "Flood1",
                    "type": "contactSensor"
                }
            ],
            "platform": "Shelly"
        }
```

**Log output**
Output of homebridge-shelly describe 192.168.100.146
```
Type: SHWT-1
CoAP description: {"blk":[{"I":1,"D":"sensor_0"},{"I":2,"D":"device"}],"sen":[{"I":9103,"T":"EVC","D":"cfgChanged","R":"U16","L":2},{"I":3101,"T":"T","D":"extTemp","U":"C","R":["-55/125","999"],"L":1},{"I":3102,"T":"T","D":"extTemp","U":"F","R":["-67/257","999"],"L":1},{"I":6106,"T":"A","D":"flood","R":["0/1","-1"],"L":1},{"I":3115,"T":"S","D":"sensorError","R":"0/1","L":1},{"I":3111,"T":"B","D":"battery","R":["0/100","-1"],"L":2},{"I":9102,"T":"EV","D":"wakeupEvent","R":["battery/button/periodic/poweron/sensor/alarm","unknown"],"L":2}]}
CoAP status: {"G":[[0,9103,0],[0,3101,22.88],[0,3102,73.18],[0,6106,0],[0,3115,0],[0,3111,97],[0,9102,["button"]]]}
HTTP Settings:: {"device":{"type":"SHWT-1","mac":"E8DB84ABEEA2","hostname":"shellyflood-ABEEA2","sleep_mode":true},"wifi_ap":{"enabled":false,"ssid":"shellyflood-ABEEA2","key":""},"wifi_sta":{"enabled":true,"ssid":"*********SOME SSID*****","ipv4_method":"dhcp","ip":null,"gw":null,"mask":null,"dns":null},"wifi_sta1":{"enabled":false,"ssid":null,"ipv4_method":"dhcp","ip":null,"gw":null,"mask":null,"dns":null},"mqtt":{"enable":false,"server":"192.168.33.3:1883","user":"","id":"shellyflood-ABEEA2","reconnect_timeout_max":60,"reconnect_timeout_min":2,"clean_session":true,"keep_alive":60,"max_qos":0,"retain":false,"update_period":30},"coiot":{"enabled":true,"update_period":15,"peer":"192.168.100.27:8581"},"sntp":{"server":"time.google.com","enabled":true},"login":{"enabled":false,"unprotected":false,"username":"admin"},"pin_code":"","name":"Flood1 Heizungsraum","fw":"20211109-125548/v1.11.7-g682a0db","discoverable":false,"build_info":{"build_id":"20211109-125548/v1.11.7-g682a0db","build_timestamp":"2021-11-09T12:55:48Z","build_version":"1.0"},"cloud":{"enabled":false,"connected":false},"timezone":"Europe/Berlin","lat":50.937931,"lng":6.87853,"tzautodetect":true,"tz_utc_offset":3600,"tz_dst":false,"tz_dst_auto":true,"time":"14:28","unixtime":1644413311,"debug_enable":false,"allow_cross_origin":false,"actions":{"active":false,"names":["report_url","flood_detected_url","flood_gone_url","temp_over_url","temp_under_url"]},"sensors":{"temperature_threshold":1,"temperature_unit":"C"},"sleep_mode":{"period":12,"unit":"h"},"rain_sensor":false,"temperature_offset":0}
HTTP Status:: {"wifi_sta":{"connected":true,"ssid":"","ip":"192.168.100.146","rssi":-64},"cloud":{"enabled":false,"connected":false},"mqtt":{"connected":false},"time":"14:28","unixtime":1644413311,"serial":1,"has_update":true,"mac":"E8DB84ABEEA2","cfg_changed_cnt":0,"actions_stats":{"skipped":0},"is_valid":true,"flood":false,"tmp":{"value":22.88,"units":"C","tC":22.88,"tF":73.18,"is_valid":true},"bat":{"value":97,"voltage":2.93},"act_reasons":["button"],"rain_sensor":false,"update":{"status":"pending","has_update":true,"new_version":"20220209-093411/v1.11.8-g8c7bb8d","old_version":"20211109-125548/v1.11.7-g682a0db","beta_version":"20220126-175139/v1.11.8-rc2-g9861f53"},"ram_total":51544,"ram_free":39540,"fs_size":233681,"fs_free":146835,"uptime":130}
```
**Environment:**
 - Shelly Flood, FW 20220209-093411/v1.11.8-g8c7bb8d
 - Plugin version: 0.19.1
 - Device running homebridge: Virtual machine (Host TrueNas) running Ubuntu 20.04. LTS