UV index has incorrect maximum value of 10
```
[homebridge-weather-plus] This plugin generated a warning from the characteristic 'UV Index': characteristic was supplied illegal value: number 11 exceeded maximum of 10. See https://git.io/JtMGR for more info.

 [homebridge-weather-plus] This plugin generated a warning from the characteristic 'UV Index': characteristic was supplied illegal value: number 11 exceeded maximum of 10. See https://git.io/JtMGR for more info.

 [homebridge-weather-plus] This plugin generated a warning from the characteristic 'UV Index': characteristic was supplied illegal value: number 11 exceeded maximum of 10. See https://git.io/JtMGR for more info.

```
Node.js: 14.16.1
NPM: 7.11.2
Homebridge: 1.3.4
OS: MacOS 10.13.6
