add multiple to Uploader

README.md

@@ -284,6 +284,7 @@ import { UploaderAnswer } from '@rinxun/custom-questions';
 | dropFileText         | string                          | 'Drop files here'                                            | false    | The text of the Drop File Area.                              |
 | files                | Array\<FileProps\>              |                                                              | true     | See **File Props** above.                                    |
 | maxSize              | number                          | 5 (MB)                                                       | false    | Maximum of the uploading file size, UOM is `MB`.             |
+| multiple             | boolean                         | false                                                        | false    | If `true` then you can upload multiple files                 |
 | onRemove             | func                            |                                                              | true     | Callback fired when removed the file.<br />**Signature:**<br/>`function(id: string|number) => void`<br/>*id:* The unique id of the removing file, but if `fileKey`is not null/undefined, here you will get the `fileKey` instead of the `id`. |
 | onUpload             | func                            |                                                              | true     | Callback fired when uploaded a file.<br />**Signature:**<br/>`function(files: Array<File>, index?: number) => void`<br/>*files:* Acceptable files you uploaded.<br />*index:* If more than 1 `Uploader` in the same page, you can define the `index`. |
 | sizeExceededErrText  | string                          | Your file exceed the max size of x MB.                       | false    | The alert message when you uploaded a size exceeded file.<br />`x` is the maximum of the uploading file size, if you set the `maxSize` that's it, otherwise, default to 5. |

components/UploaderAnswer.tsx

@@ -17,6 +17,7 @@ export interface FileProps {
 export interface UploaderAnswerProps {
   color?: CSSProperties['color'];
   files: Array<FileProps>;
+  multiple?: boolean;
   onUpload: (files: Array<File>, index?: number) => void;
   onRemove: (id: string | number) => void;
   viewType: ViewTypeEnum;