Add Smartcar API to the "Vehicles" category (#981)

* Add Smartcar API to "Vehicles" category

* Update README.md

Co-Authored-By: Aliaksei Urbanski <mimworkmail@gmail.com>

README.md

@@ -840,6 +840,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Kelley Blue Book](http://developer.kbb.com/#!/data/1-Default) | Vehicle info, pricing, configuration, plus much more | `apiKey` | Yes | No |
 | [Mercedes-Benz](https://developer.mercedes-benz.com/apis) | Telematics data, remotely access vehicle functions, car configurator, locate service dealers | `apiKey` | Yes | No |
 | [NHTSA](https://vpic.nhtsa.dot.gov/api/) | NHTSA Product Information Catalog and Vehicle Listing | No | Yes | Unknown |
+| [Smartcar](https://smartcar.com/docs/) | Lock and unlock vehicles and get data like odometer reading and location. Works on most new cars. | OAuth | Yes | Yes |
 
 ### Video
 API | Description | Auth | HTTPS | CORS |