Add Geokeo (#2012)

Issue #2002 
resolve #1916 

Squased:

* Added Geokeo geocoding API in alphabetical order

* Added Geokeo's Https support

README.md

@@ -621,6 +621,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Geocoding.ai](https://nominatim.geocoding.ai/) | Provides worldwide forward / reverse geocoding | No | Yes | Yes |
 | [GeoDataSource](https://www.geodatasource.com/web-service) | Geocoding of city name by using latitude and longitude coordinates | `apiKey` | Yes | Unknown |
 | [GeoJS](https://geojs.io/) | IP geolocation with ChatOps integration | No | Yes | Yes |
+| [Geokeo](https://geokeo.com) | Geokeo geocoding service- with 2500 free api requests daily | No | Yes | Yes |
 | [GeoNames](http://www.geonames.org/export/web-services.html) | Place names and other geographical data | No | No | Unknown |
 | [geoPlugin](https://www.geoplugin.com) | IP geolocation and currency conversion | No | Yes | Yes |
 | [Google Earth Engine](https://developers.google.com/earth-engine/) | A cloud-based platform for planetary-scale environmental data analysis | `apiKey` | Yes | Unknown |