Windows 10 Shutdown stopped working
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### Backstory
I recently updated to WoL 5.0 and my shutdown command seems to have stopped working. I can still turn on the PC but the shutdown command doesn’t seem to work. I can run the net rpc command from Homebridge manually and it works.

### Issue
WoL plug-in is not giving shutdown command.

### Environment
* os & os version:
* node version:
* homebridge version: 1.4.0
* homebridge-wol version: 5.0

### Configuration
My configuration looks like this:

{
            "name": "Node804",
            "manufacturer": "homebridge-wol",
            "model": "NetworkDevice",
            "host": "<host>",
            "pingInterval": 5,
            "pingsToChange": 5,
            "pingTimeout": 1,
            "pingCommandTimeout": 0,
            "mac": "<mac-address>",
            "startCommandTimeout": 0,
            "wakeGraceTime": 45,
            "wakeCommandTimeout": 0,
            "shutdownCommand": "net rpc shutdown —ipaddress 192.168.40.185 —user node804%password",
            "shutdownGraceTime": 60,
            "shutdownCommandTimeout": 0,
            "logLevel": "Info",
            "returnEarly": false,
            "_bridge": {
                "username": "0E:05:72:E6:CC:02",
                "port": 47757
            },
            "accessory": "NetworkDevice"
        }

Please paste your homebridge config.json here

IMPORTANT!
Remove any mac addresses from the configuration by
exchanging them with <mac-address>
