message: docs(Cascader): update field-names type
diff: @@ -255,7 +255,7 @@ export default {
  | closeable | Whether to show close icon | _boolean_ | `true` |
  | show-header `v3.4.2` | Whether to show header | _boolean_ | `true` |
  | close-icon `v3.0.10` | Close icon name | _string_ | `cross` |
  -| field-names `v3.0.4` | Custom the fields of options | _object_ | `{ text: 'text', value: 'value', children: 'children' }` |
  +| field-names `v3.0.4` | Custom the fields of options | _CascaderFieldNames_ | `{ text: 'text', value: 'value', children: 'children' }` |
  ### Data Structure of CascaderOption
  