message: [improvement] add type definition of new components
diff: @@ -13,8 +13,6 @@ export class ActionSheet extends VanComponent {}
  export class AddressEdit extends VanComponent {}
  export class AddressList extends VanComponent {}
  export class Area extends VanComponent {}
  -export class Sidebar extends VanComponent {}
  -export class SidebarGroup extends VanComponent {}
  export class Button extends VanComponent {}
  export class Card extends VanComponent {}
  export class Cell extends VanComponent {}
  @@ -32,11 +30,16 @@ export class ContactList extends VanComponent {}
  export class CouponCell extends VanComponent {}
  export class CouponList extends VanComponent {}
  export class DatetimePicker extends VanComponent {}
  +export class DropdownItem extends VanComponent {}
  +export class DropdownMenu extends VanComponent {}
  export class Field extends VanComponent {}
  export class GoodsAction extends VanComponent {}
  export class GoodsActionButton extends VanComponent {}
  export class GoodsActionIcon extends VanComponent {}
  export class Icon extends VanComponent {}
  +export class IndexAnchor extends VanComponent {}
  +export class IndexBar extends VanComponent {}
  +export class Info extends VanComponent {}
  export class List extends VanComponent {}
  export class Loading extends VanComponent {}
  export class NavBar extends VanComponent {}
  @@ -54,6 +57,9 @@ export class RadioGroup extends VanComponent {}
  export class Rate extends VanComponent {}
  export class Row extends VanComponent {}
  export class Search extends VanComponent {}
  +export class Sidebar extends VanComponent {}
  +export class SidebarItem extends VanComponent {}
  +export class Skeleton extends VanComponent {}
  export class Sku extends VanComponent {}
  export class Slider extends VanComponent {}
  export class Step extends VanComponent {}
  