Add XIVAPI (Final Fantasy XIV game data REST api) (#1032)

XIVAPI is a project that exposes a search endpoint for game data and direct data access for Final Fantasy XIV game data.

README.md

@@ -377,6 +377,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Eve Online](https://esi.evetech.net/ui) | Third-Party Developer Documentation | `OAuth` | Yes | Unknown |
 | [Fortnite](https://fortniteapi.com/) | Fortnite Stats & Cosmetics | `apiKey` | Yes | Yes |
 | [Fortnite](https://fortnitetracker.com/site-api) | Fortnite Stats | `apiKey` | Yes | Unknown |
+| [Final Fantasy XIV](https://xivapi.com/) | Final Fantasy XIV Game data API | No | Yes | Yes |
 | [Giant Bomb](https://www.giantbomb.com/api/documentation) | Video Games | No | Yes | Unknown |
 | [Guild Wars 2](https://wiki.guildwars2.com/wiki/API:Main) | Guild Wars 2 Game Information | `apiKey` | Yes | Unknown |
 | [Halo](https://developer.haloapi.com/) | Halo 5 and Halo Wars 2 Information | `apiKey` | Yes | Unknown |