Latest update breaks my 4CHPROR2 (PSF-B04-GL)  Sonoff switch
### What issue do you have? Please be as thorough and explicit as possible.
After latest update my 4CHPROR2 (PSF-B04-GL) posts in Homebridge and Homeapp, but the switch does not react or receive any commands. Rolling back to previous homebridge-ewelink v5.0.6 version resolves the issue. 
All other eWlink single channel devices behave like before. 
I tried adding it as multi-channel device manually in the config UI, same result. Removing it manually in the plugin-setup did not revert it back, removing the JSON config entry manually did not revert it back. Only reverting back the plugin to the v5.0.6. version resolves the issue. 


### Details of your setup.
* Homebridge on Raspberry Pi 4 +  config-ui, Node-Red. Node.js v14.15.5., NPM v6.14.11



* Which version of Homebridge/HOOBS do you have?
Latest v1.3.1


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



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


### Please paste any relevant logs below.

In the log everything seems to be ok. Like all the single eWlink devices it seems to receive commands, but just ignores them. The Accessories UI in both Homebridge and Home.app reflect the state changes correctly, but the device it self does not react to it. 

<!-- ABOUT LOGS
[02/03/2021, 17:30:28] [eWeLink] [Devicecaca72 SW3] sending update {"switches":[{"switch":"off","outlet":0},{"switch":"off","outlet":1},{"switch":"off","outlet":2},{"switch":"off","outlet":3}]}.
-->
