Merge branch '2.x' into dev

types/calendar.d.ts

@@ -2,4 +2,6 @@ import { VanComponent } from './component';
 
 export class Calendar extends VanComponent {
   reset(): void;
+
+  scrollToDate(date: Date): void;
 }

types/index-bar.d.ts

@@ -0,0 +1,5 @@
+import { VanComponent } from './component';
+
+export class IndexBar extends VanComponent {
+  scrollTo(index: number | string): void;
+}

types/index.d.ts

@@ -14,6 +14,7 @@ import { DropdownItem } from './dropdown-item';
 import { Field } from './field';
 import { Form } from './form';
 import { ImagePreview } from './image-preview';
+import { IndexBar } from './index-bar';
 import { Lazyload } from './lazyload';
 import { List } from './list';
 import { Locale } from './locale';
@@ -59,7 +60,6 @@ export class ActionBarButton extends VanComponent {}
 export class Icon extends VanComponent {}
 export class Image extends VanComponent {}
 export class IndexAnchor extends VanComponent {}
-export class IndexBar extends VanComponent {}
 export class Info extends VanComponent {}
 export class Loading extends VanComponent {}
 export class NavBar extends VanComponent {}
@@ -109,6 +109,7 @@ export {
   Form,
   Field,
   ImagePreview,
+  IndexBar,
   Lazyload,
   List,
   Locale,