message: fix: add label === ''
diff: @@ -166,7 +166,7 @@ class FormItem extends Component {
  return (
  <div className={classNames('hi-form-item', className, obj)}>
  {
  - label ? (
  + (label || label === '') ? (
  <label className='hi-form-item__label' style={{ width: this.labelWidth }}>
  {typeof label === 'string' && label.trim()}{shouldShowColon && colon}
  </label>
  