Update
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### What issue do you have? Please be as thorough and explicit as possible.

I'm on 3.9.0 version and hoobs inform me to update on 4.7.3
Process update seems complete fine but still in 3.9.0

### Details of your setup.
* Do you use (1) Homebridge (+ config-ui), (2) Homebridge (CLI) or (3) HOOBS? 
Hoobs


* Which version of Homebridge/HOOBS do you have?

3.3.2

* 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.



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

3.9.0

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


### Please paste any relevant logs below.
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