Add AviationWeather (#1773)

README.md

@@ -1113,6 +1113,7 @@ API | Description | Auth | HTTPS | CORS |
 | [7Timer!](http://www.7timer.info/doc.php?lang=en) | Weather, especially for Astroweather | No | No | Unknown |
 | [AccuWeather](https://developer.accuweather.com/apis) | Weather and forecast data | `apiKey` | No | Unknown |
 | [APIXU](https://www.apixu.com/doc/request.aspx) | Weather | `apiKey` | Yes | Unknown |
+| [AviationWeather](https://www.aviationweather.gov/dataserver) | NOAA aviation weather forecasts and observations | No | Yes | Unknown |
 | [ColorfulClouds](https://open.caiyunapp.com/ColorfulClouds_Weather_API) | Weather | `apiKey` | Yes | Yes |
 | [Foreca](https://developer.foreca.com) | Weather | `OAuth` | Yes | Unknown |
 | [MetaWeather](https://www.metaweather.com/api/) | Weather | No | Yes | No |