add MapQuest API to Geocoding

README.md

@@ -763,6 +763,7 @@ API | Description | Auth | HTTPS | CORS |
 | [LocationIQ](https://locationiq.org/docs/) | Provides forward/reverse geocoding and batch geocoding | `apiKey` | Yes | Yes |
 | [Longdo Map](https://map.longdo.com/docs/) | Interactive map with detailed places and information portal in Thailand | `apiKey` | Yes | Yes |
 | [Mapbox](https://www.mapbox.com/developers/) | Create/customize beautiful digital maps | `apiKey` | Yes | Unknown |
+| [MapQuest](https://developer.mapquest.com/) | To access tools and resources to map the world | `apiKey` | Yes | No | Yes
 | [Mexico](https://github.com/IcaliaLabs/sepomex) | Mexico RESTful zip codes API | No | Yes | Unknown |
 | [Nominatim](https://nominatim.org/release-docs/latest/api/Overview/) | Provides worldwide forward / reverse geocoding | No | Yes | Yes |
 | [One Map, Singapore](https://docs.onemap.sg/) | Singapore Land Authority REST API services for Singapore addresses | `apiKey` | Yes | Unknown |