docs: update readme for loop, autoPlay, autoPlayDelay

Author: kimcoder

Diff for: README.md

@@ -83,6 +83,9 @@ If You want to see more detail source,<br>
 |    **showNavs**     | `Boolean`  | `Required` | Toggle Arrow                                                                                                                                                      |
 |   **startIndex**    |  `Number`  | `Optional` | start Index of Slide                                                                                                                                              | 0         |
 |   **showBullets**   | `Boolean`  | `Required` | Toggle Bullets                                                                                                                                                    | `true`    |
+|      **loop**       | `Boolean`  | `Optional` | looping slider                                                                                                                                                    | `true`    |
+|    **autoPlay**     | `Boolean`  | `Optional` | auto play                                                                                                                                                         | `false`   |
+|  **autoPlayDelay**  | `Boolean`  | `Optional` | auto play delay                                                                                                                                                   | 2.0       |
 |  **useGPURender**   | `Boolean`  | `Optional` | Toggle GPU Render                                                                                                                                                 | `true`    |
 |     **bgColor**     |  `String`  | `Optional` | slider container's css background-color property                                                                                                                  | `#000000` |
 |     **onClick**     | `Function` | `Optional` | Image Click Callback function,<br>`onClick = (idx, event) => { }`<br>idx : number : clicked bullet index (begin from 0)                                           |           |