message: fix(Picker): option.className not work
diff: @@ -213,10 +213,13 @@ export default defineComponent({
  role: 'button',
  style: optionStyle,
  tabindex: disabled ? -1 : 0,
  - class: bem('item', {
  + class: [
  + bem('item', {
  disabled,
  selected: value === props.value,
  }),
  + option.className,
  + ],
  onClick: () => onClickItem(index),
  };
  