message: Added Btn, Tabs and Tabs missing types
diff: @@ -229,6 +229,11 @@ declare module "native-base" {
  * [android] colored ripple effect
  */
  androidRippleColor?: string;
  + /**
  + * Segments
  + */
  + first?: boolean;
  + last?: boolean;
  }
  /**
  @@ -641,15 +646,17 @@ declare module "native-base" {
  onChangeTab?: Function;
  locked?: boolean;
  initialPage?: number;
  + style?: ReactNative.ViewStyle;
  }
  interface Tab {
  - heading: _TabHeading;
  + heading: _TabHeading | string | React.ReactElement<any>;
  }
  interface TabHeading {
  activeTabStyle?: ReactNative.ViewStyle;
  textStyle?: ReactNative.TextStyle;
  activeTextStyle?: ReactNative.TextStyle;
  + style?: ReactNative.ViewStyle;
  }
  interface Item {
  