Add KMA api (#181)

README.md

@@ -1841,6 +1841,7 @@
 | [Foreca](https://developer.foreca.com) | Weather | `OAuth`| Yes | Unknown |
 | [HG Weather](https://hgbrasil.com/status/weather) | Provides weather forecast data for cities in Brazil | `apiKey` | Yes | Yes |
 | [Hong Kong Obervatory](https://www.hko.gov.hk/en/abouthko/opendata_intro.htm) | Provide weather information, earthquake information, and climate data | No | Yes | Unknown |
+| [Korea Meteorological Administration](https://apihub.kma.go.kr/) | Weather and climate data from KMA | `apiKey` | Yes | Unknown |
 | [Meteorologisk Institutt](https://api.met.no/weatherapi/documentation) | Weather and climate data | `User-Agent` | Yes | Unknown |
 | [Meteosource](https://www.meteosource.com/) | Global weather forecasts based on machine learning and historical data | `apiKey` | Yes | Unknown |
 | [Met Office DataPoint](https://www.metoffice.gov.uk/services/data/datapoint/) | Weather data for the UK | `apiKey` | Yes | Unknown |