Add Cross Universe (#1990)

README.md

@@ -538,6 +538,7 @@ API | Description | Auth | HTTPS | CORS |
 | [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 | `apiKey` | Yes | Unknown |
 | [Comic Vine](https://comicvine.gamespot.com/api/documentation) | Comics | No | Yes | Unknown |
+| [Cross Universe](https://crossuniverse.psychpsyo.com/apiDocs.html) | Cross Universe Card Data | No | Yes | Yes |
 | [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 |
 | [Dota 2](https://docs.opendota.com/) | Provides information about Player stats , Match stats, Rankings for Dota 2 | `apiKey` | Yes | Unknown |