chore: updated opendatafrance geocoder api endpoints (#366)

The api moved from data.gouv.fr to the "IGN Geoplateforme", see
https://www.data.gouv.fr/fr/posts/lapi-adresse-de-la-base-adresse-nationale-est-transferee-a-lign-10
The api remains the same (iso fonctionnel).

Author: robinbourianes-kalisio

lib/geocoder/opendatafrancegeocoder.js

@@ -12,13 +12,13 @@ var OpendataFranceGeocoder = function OpendataFranceGeocoder(httpAdapter, option
 
 util.inherits(OpendataFranceGeocoder, AbstractGeocoder);
 
-OpendataFranceGeocoder.prototype._endpoint = 'https://api-adresse.data.gouv.fr/search';
+OpendataFranceGeocoder.prototype._endpoint = 'https://data.geopf.fr/geocodage/search';
 
-OpendataFranceGeocoder.prototype._endpoint_reverse = 'https://api-adresse.data.gouv.fr/reverse';
+OpendataFranceGeocoder.prototype._endpoint_reverse = 'https://data.geopf.fr/geocodage/reverse';
 
 /**
 * Geocode
-* @param <string|object>   value    Value to geocode (Address or parameters, as specified at https://opendatafrance/api/)
+* @param <string|object>   value    Value to geocode (Address or parameters, as specified at https://geoservices.ign.fr/documentation/services/services-geoplateforme/geocodage)
 * @param <function> callback Callback method
 */
 OpendataFranceGeocoder.prototype._geocode = function(value, callback) {