Ran PropTypes -> prop-types codemod

Reviewed By: gaearon

Differential Revision: D5453511

fbshipit-source-id: 6abe3dfa6d8cf70cc49ce2b6a7d3e94679398c5e

Author: Brian Vaughn

Libraries/Components/MaskedView/MaskedViewIOS.ios.js

@@ -10,12 +10,13 @@
  * @flow
  */
 
+const PropTypes = require('prop-types');
 const React = require('React');
 const StyleSheet = require('StyleSheet');
 const View = require('View');
 const ViewPropTypes = require('ViewPropTypes');
 const requireNativeComponent = require('requireNativeComponent');
-const ReactPropTypes = React.PropTypes;
+const ReactPropTypes = PropTypes;
 
 import type { ViewProps } from 'ViewPropTypes';