Added `badgeColor` typing for `OptionsBottomTab` (#4245)

lib/src/interfaces/Options.ts

    * Set the text in a badge that is overlayed over the component
    */
   badge?: string;
+  /**
+   * Set the background color of the badge that is overlayed over the component
+   */
+  badgeColor?: string;
   /**
    * Set a testID to reference the tab in E2E tests
    */