Add Auth to Clash Royale API (#972)

Clash Royale is protected by an API key

README.md

@@ -364,7 +364,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Battlefield 4](https://bf4stats.com/api) | Battlefield 4 Information | No | Yes | Unknown |
 | [Chuck Norris Database](http://www.icndb.com/api/) | Jokes | No | No | Unknown |
 | [Clash of Clans](https://developer.clashofclans.com) | Clash of Clans Game Information | `apiKey` | Yes | Unknown |
-| [Clash Royale](https://developer.clashroyale.com) | Clash Royale Game Information | No | Yes | Unknown |
+| [Clash Royale](https://developer.clashroyale.com) | Clash Royale Game Information | `apiKey` | Yes | Unknown |
 | [Comic Vine](https://comicvine.gamespot.com/api/documentation) | Comics | No | Yes | Unknown |
 | [Deck of Cards](http://deckofcardsapi.com/) | Deck of Cards | No | No | Unknown |
 | [Destiny The Game](https://github.com/Bungie-net/api) | Bungie Platform API | `apiKey` | Yes | Unknown |