message: fix cascader onChange
diff: @@ -158,11 +158,10 @@ class Cascader extends Component {
  cascaderValue: value
  }, () => {
  if (changeOnSelect || !hasChildren) {
  - onChange(value)
  this.setState({
  cacheValue: value,
  cascaderLabel: this.getCascaderLabel(value)
  - })
  + }, () => onChange(value))
  }
  if (hasChildren) {
  onActiveItemChange(value)
  