message: Added missing props `span` and `hasSubtitle` to header interface in index.d.ts.
  Fix for issue (span, hasSubtitle - missing from typing (Header))
diff: @@ -91,6 +91,8 @@ declare module "native-base" {
  */
  hasTabs?: boolean;
  noShadow?: boolean;
  + hasSubtitle?: boolean;
  + span?: boolean;
  androidStatusBarColor?: string;
  iosBarStyle?: ReactNative.StatusBarStyle;
  }
  