Add CheapShark API (#1274)

Co-authored-by: Yann Bertrand <5855339+yannbertrand@users.noreply.github.com>

README.md

@@ -375,6 +375,7 @@ API | Description | Auth | HTTPS | CORS |
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
 | [Age of Empires II](https://age-of-empires-2-api.herokuapp.com) | Get information about Age of Empires II resources | No | Yes | Unknown |
+| [CheapShark](https://www.cheapshark.com/api) | Steam/PC Game Prices and Deals | No | Yes | Yes |
 | [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 | `apiKey` | Yes | Unknown |