Smart Switch Support
* **Please explain your feature request in a one or two sentences.**
I wanted to add my Meross Smart Switches to homebrige with this plugin but they didn't show up. In the log it said:
```
[Smart Switch] is currently not supported, do create a github issue https://git.io/JtfVC with info:
{"uuid":"2105109139581890850948e1e970e0d5","onlineStatus":1,"devName":"Smart Switch","devIconId":"device027_un","bindTime":1631345651,"deviceType":"mss710r","subType":"un","channels":[{}],"region":"eu","fmwareVersion":"4.2.3","hdwareVersion":"4.0.0","userDevIcon":"","iconType":1,"skillNumber":"","cluster":1,"domain":"mqtt-eu.meross.com","reservedDomain":"mqtt-eu.meross.com","firmware":"4.2.3","hbDeviceId":"2105109139581890850948e1e970e0d5","model":"MSS710R"}
```
...and for the second one:
```
[Smart Switch] is currently not supported, do create a github issue https://git.io/JtfVC with info:
{"uuid":"2105109694958990850948e1e970f78a","onlineStatus":1,"devName":"Smart Switch","devIconId":"device027_un","bindTime":1631345649,"deviceType":"mss710r","subType":"un","channels":[{}],"region":"eu","fmwareVersion":"4.2.3","hdwareVersion":"4.0.0","userDevIcon":"","iconType":1,"skillNumber":"","cluster":1,"domain":"mqtt-eu.meross.com","reservedDomain":"mqtt-eu.meross.com","firmware":"4.2.3","hbDeviceId":"2105109694958990850948e1e970f78a","model":"MSS710R"}
```

The product number is `MSS710HKIT`. I read that there is support for the regular MSS710 but aparently not the HomeKit version.
The Github link is dead but I thought I should post here.

* **Is your feature request related to a problem? Please describe.**
No


* **Any particular Meross devices that this relates to?**
The Meross Smart Wi-Fi Switch with HomeKit support


* **Anything else?**
Thanks for making this plugin!

