Sonoff B05 light bulb: actual brightness is much lower when set to 100% in Home app compared to 100% set in eWeLink app
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### What issue do you have? Please be as thorough and explicit as possible.

If I set the brightness of my Sonoff B05-B-A60 in eWeLink, it shines much brighter compared to setting 100% brightness for the same light bulb in Home app

### Details of your setup.
* Do you use Homebridge (with config-ui?) or HOOBS? 

Homebridge

* Which version of Homebridge/HOOBS do you have?

homebridge-config-ui-x v4.36.0

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

homebridge-ewelink v3.18.1

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

Sonoff B05-B-A60

* Do you use your main eWeLink credentials or do you use a secondary eWeLink account for Homebridge?

I use my main eWeLink credentials

### Please paste any relevant logs below.
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```

Below is what I see in logs when I set the brightness to 100% in Home app. No errors
{
  "deviceid": "**hidden**",
  "params": {
    "switch": "on",
    "ltype": "color",
    "color": {
      "r": 222,
      "g": 126,
      "b": 32,
      "br": 100
    },
    "online": true,
    "updateSource": "WS"
  }
}

```
