Changed View.propTypes.style to ViewPropTypes.style as outdated and breaking android app in production

Author: jreason

index.js

@@ -3,7 +3,7 @@
 import React, {Component} from 'react';
 import {PropTypes} from 'prop-types';
 import {
-    View,
+    ViewPropTypes,
     WebView,
     StyleSheet,
 } from 'react-native';
@@ -18,7 +18,7 @@ class SignaturePad extends Component {
     static propTypes = {
         onChange: PropTypes.func,
         onError: PropTypes.func,
-        style: View.propTypes.style,
+        style: ViewPropTypes.style,
         penColor: PropTypes.string,
         dataURL: PropTypes.string,
         height: PropTypes.number,