message: Fix for issue
  Issue : Typescript declaration file missing ScrollableTab
diff: @@ -652,10 +652,27 @@ declare module "native-base" {
  tweenHandler?: Function;
  type?: "overlay" | "static" | "displace";
  }
  + interface ScrollableTab {
  + goToPage?: Function;
  + activeTab?: number;
  + tabs?: Array<any>;
  + backgroundColor?: string;
  + activeTextColor?: string;
  + inactiveTextColor?: string;
  + scrollOffset?: number;
  + style?: ReactNative.ViewStyle;
  + tabStyle?: ReactNative.ViewStyle;
  + tabsContainerStyle?: ReactNative.ViewStyle;
  + renderTab?: Function;
  + underlineStyle?: ReactNative.ViewStyle;
  + onScroll?: Function;
  + }
  +
  /**
  * see Widget Tabs.js
  */
  interface Tabs {
  + renderTabBar?: Function;
  tabBarPosition?: "top" | "bottom";
  edgeHitWidth?: number;
  springTension?: number;
  @@ -963,6 +980,10 @@ declare module "native-base" {
  */
  export class Drawer extends React.Component<NativeBase.Drawer, any> {}
  /**
  + * NativeBase.ScrollableTab
  + */
  + export class ScrollableTab extends React.Component<NativeBase.ScrollableTab, any> { }
  + /**
  * NativeBase.Tabs
  *
  * Tabs are a horizontal region of buttons or links that allow for a consistent navigation experience between screens.
  