showAs - doesn't seem to change device type e.g. garage 
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### What issue do you have? Please be as thorough and explicit as possible.

I tried chaniging showAs to many things as in the examples but it doesn't seem to have an effect on device type and always shows up as switch in homekit and homebridge.


### Details of your setup.
* Do you use (1) Homebridge UI-X
I use homebridge 1.5.1 with nodejs v16.18.1
hardware 4ch (can actuate - it works)
IOS16



* Which platform do you run Homebridge/HOOBS on (e.g. Raspberry Pi/Windows/HOOBS Box)? Please also mention your version of Node.js/NPM if known.

rpi


* Which version of this plugin (homebridge-ewelink) do you have? Has the issue started since upgrading from a previous version?

v10.3.0

* Which eWeLink devices do you have that are causing issues? Please include product models if applicable.

4CH

### Please paste any relevant logs below.

```
            "name": "eWeLink",
            "username": "xxx@xxx.xxx",
            "password": "yyy-zzz-zzz",
            "mode": "auto",
            "debug": true,
            "language": "en",
            "multiDevices": [
                {
                    "label": "Front Gate",
                    "deviceId": "1001722771",
                    "deviceModel": "4ch",
                    "showAs": "garage",
                    "ipAddress": "192.162.68.21",
                    "overrideLogging": "default"
                }
            ],
            "platform": "eWeLink"
```
![image](https://user-images.githubusercontent.com/19908009/203445924-03eb74d0-85a6-4de2-acfe-f94f04d8741b.png)
