message: Typed image to string for android
  Added ImageRequireSource fro iOS
diff: import { Component, ReactNode } from 'react';
  -import { ImageURISource, StyleProp, ViewStyle } from 'react-native';
  +import { ImageRequireSource, ImageURISource, StyleProp, ViewStyle } from 'react-native';
  import { StateNavigator, State } from 'navigation';
  /**
  @@ -212,7 +212,7 @@ export interface TabBarItemProps {
  /**
  * The tab image
  */
  - image?: ImageURISource;
  + image?: ImageRequireSource | ImageURISource | string;
  /**
  * The tab system item
  */
  