It crashes Homebridge if WU PWS is down.
It crashes Homebridge if WU PWS is down.

[9/30/2019, 3:31:42 AM] SyntaxError: Unexpected end of JSON input
    at JSON.parse (<anonymous>:null:null)
    at WundergroundAPI.<anonymous> (/usr/local/lib/node_modules/homebridge-weather-plus/api/weatherunderground.js:45:38)
    at Request.self.callback (/usr/local/lib/node_modules/homebridge-weather-plus/node_modules/request/request.js:185:22)
    at Request.emit (events.js:203:13)
    at Request.<anonymous> (/usr/local/lib/node_modules/homebridge-weather-plus/node_modules/request/request.js:1161:10)
    at Request.emit (events.js:203:13)
    at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/homebridge-weather-plus/node_modules/request/request.js:1083:12)
    at Object.onceWrapper (events.js:291:20)
    at IncomingMessage.emit (events.js:208:15)
    at endReadableNT (_stream_readable.js:1154:12)
    at processTicksAndRejections (internal/process/task_queues.js:77:11)

[9/30/2019, 3:31:42 AM] Got SIGTERM, shutting down Homebridge...
