Bug Temperature at or below 0 Home App not working
Good evening,

First of all thank you for this plugin which is really nice!
I have a small issue with the following sensors :
- Apparent temperature
- Dew point
- Minimum and maximum temperature

When I reach 0 degrees or below the Home App from Apple see these as "No reponse", this is a bit strange because on Homebridge I can see the temperature -1.1°C or 0°C. I first, I thought the API wasn't working properly but this isn't the case as in debug mode I can see the JSON from openweathermap and obviously the temperature is showed correctly in Homebridge. 

If any one as any idea, I already restart homebridge and the server. I will try to remove and reinstall the package to see if this is making any change.

You can see below my config file :
`{
            "units": "ca",
            "interval": 15,
            "stations": [
                {
                    "nameNow": "Home",
                    "service": "openweathermap",
                    "key": " *******",
                    "locationGeo": [
                         *******,
                         *******
                    ],
                    "locationCity": " *******",
                    "language": "en",
                    "compatibility": "home",
                    "conditionCategory": "simple",
                    "now": true,
                    "extraHumidity": false
                },
                {
                    "nameNow": "forecast",
                    "service": "openweathermap",
                    "key": " *******",
                    "locationGeo": [
                       *******,
                       *******
                    ],
                    "locationCity": " *******",
                    "language": "en",
                    "compatibility": "home",
                    "forecast": [
                        "Tomorrow"
                    ],
                    "nameForecast": "forecast",
                    "conditionCategory": "simple",
                    "now": false,
                    "extraHumidity": false
                }
            ],
            "platform": "WeatherPlus"
        }`

Thank you,

Francois