message: types(Cascader): add typing
diff: @@ -35,6 +35,7 @@ export class AddressList extends VanComponent {}
  export class Badge extends VanComponent {}
  export class Button extends VanComponent {}
  export class Card extends VanComponent {}
  +export class Cascader extends VanComponent {}
  export class Cell extends VanComponent {}
  export class CellGroup extends VanComponent {}
  export class Circle extends VanComponent {}
  