Merge pull request #1617 from visualcrossing/master

Add Visual Crossing Weather API

README.md

@@ -1066,6 +1066,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Storm Glass](https://stormglass.io/) | Global marine weather from multiple sources | `apiKey` | Yes | Yes |
 | [TheRainery](https://therainery.com/documentation/) | Forecast models from meteorological institutes | `apiKey` | Yes | No |
 | [Troposphere](https://www.troposphere.io/developer) | Global weather and climate data | `apiKey` | Yes | Yes |
+| [Visual Crossing](https://www.visualcrossing.com/weather-api) | Global historical and weather forecast data | `apiKey` | Yes | Yes |
 | [weather-api](https://github.com/robertoduessmann/weather-api) | A RESTful free API to check the weather | No | Yes | No |
 | [Weatherbit](https://www.weatherbit.io/api) | Weather | `apiKey` | Yes | Unknown |
 | [weatherstack](https://weatherstack.com/) | Real-Time & Historical World Weather Data API | `apiKey` | Yes | Unknown |