docs: add documentation for new props

Author: aojunhao123

README.md

@@ -133,6 +133,8 @@ export default () => (
 | optionRender | Custom rendering options | (oriOption: FlattenOptionData\<BaseOptionType\> , info: { index: number }) => React.ReactNode | - |
 | labelRender  | Custom rendering label   |  (props: LabelInValueType) => React.ReactNode   | - |
 | maxCount | The max number of items can be selected | number | - |
+| onBlurRemoveSpace | Whether to remove space when losing focus, only applies when `mode` is `tags` | boolean | true |
+| onBlurAddValue | Whether to add the input value to the selected item when losing focus, only applies when `mode` is `tags` | boolean | true |
 
 ### Methods