Replace PropTypes from react with form prop-types package (#677)

import React, {Component, PropTypes} from 'react';

import React, {Component} from 'react';

import PropTypes from 'prop-types';

import {StyleSheet, requireNativeComponent, NativeModules, View, Image} from 'react-native';

import resolveAssetSource from 'react-native/Libraries/Image/resolveAssetSource';

import VideoResizeMode from './VideoResizeMode.js';

  },

  "dependencies": {

    "keymirror": "0.1.1",

    "prop-types": "^15.5.10",

    "react-native-windows": "0.41.0-rc.0"

  },

  "scripts": {