fix test

Author: VladislavMedved

lib/index.js

@@ -685,7 +685,8 @@ MapboxGeocoder.prototype = {
       // client only accepts one type for reverseGeocode, so
       // use first config type if one, if not default to poi for v5 and address for v6
       const defaultType = this.options.version === 'v6' ? ["address"] : ["poi"];
-      config.types = config.types ? [config.types[0]] : defaultType;
+      // [TODO]: possibly remove. client can accept more than one type. also assigning something to config.types can break backward compatibility
+      config.types ? [config.types[0]] : defaultType;
       config = extend(config,
         this.options.version === 'v6' ? { longitude: coords[0], latitude: coords[1]} : { query: coords },
         {limit: 1 }