statusPattern not working as expected
**Describe the bug**

I'm not sure this is being a bug. 
More likely a support request to setup a working `statusPattern`...

I've got this endpoint `http://hyperhdr.local/json-rpc?xxxx`
It returns me the following JSON body (truncated version):
```
{
    "command": "serverinfo",
    "info": {
        "videomodehdr": 0
    },
    "success": true,
    "tan": 0
}
```
I would like to use the `videomodehdr` property to get the state of my stateful switch:
-  `"videomodehdr": 0` => Switch OFF
-  `"videomodehdr": 1` => Switch ON

To do so I set up the `statusPattern` property as following:
```"statusPattern": "/.*\"videomodehdr\": 1.*/gms"```

But the switch status is aways being detected as OFF.

**Expected behavior**
The statusPattern/RegEx ```"statusPattern": "/.*\"videomodehdr\": 1.*/gms"``` to correctly set my switch status.

**Version** (output of `npm list -g homebridge homebridge-http-switch`)
 - homebridge: 1.4.0
 - homebridge-http-switch: 0.5.35

**Configuration**
```
{
    "accessory": "HTTP-SWITCH",
    "name": "Ambi HDR",
    "switchType": "stateful",
    "onUrl": "http://hyperhdr.local:8090/json-rpc?request=%7B%22command%22:%22componentstate%22,%22componentstate%22:%7B%22component%22:%22HDR%22,%22state%22:true%7D%7D",
    "offUrl": "http://hyperhdr.local:8090/json-rpc?request=%7B%22command%22:%22componentstate%22,%22componentstate%22:%7B%22component%22:%22HDR%22,%22state%22:false%7D%7D",
    "statusUrl": "http://hyperhdr.local:8090/json-rpc?request=%7B%22command%22:%22serverinfo%22%7D",
    "statusPattern": "/.*\"videomodehdr\": 1.*/gms",
    "debug": true,
    "pullInterval": 50000
}
```
