Add Mockaroo API to Test Data

Fix apiKey syntax highlighting

README.md

@@ -1222,6 +1222,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Loripsum](http://loripsum.net/) | The "lorem ipsum" generator that doesn't suck | No | No | Unknown |
 | [Mailsac](https://mailsac.com/docs/api) | Disposable Email | `apiKey` | Yes | Unknown |
 | [Metaphorsum](http://metaphorpsum.com/) | Generate demo paragraphs giving number of words and sentences | No | No | Unknown |
+| [Mockaroo](https://www.mockaroo.com/docs) | Generate fake data to JSON, CSV, TXT, SQL and XML | `apiKey` | Yes | Unknown |
 | [PIPL](https://pipl.ir/) | Free and public API that generates random and fake people's data in JSON | No | Yes | No |
 | [QuickMocker](https://quickmocker.com) | API mocking tool to generate contextual, fake or random data | No | Yes | Yes |
 | [Randommer](https://randommer.io/randommer-api) | Random data generator | `apiKey` | Yes | Yes |