Add external prop-types module because react removed prop-types

Author: maluramichael

components/NavBarContainer.js

@@ -1,4 +1,5 @@
-import React, { PropTypes } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import {
   BackAndroid,
   Platform,

components/NavBarContent.js

@@ -1,4 +1,5 @@
-import React, { PropTypes } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import {
   Animated,
   Easing,

components/NavButton.js

@@ -1,4 +1,5 @@
-import React, { PropTypes } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import {
   StyleSheet,
   Text,

index.js

@@ -1,4 +1,5 @@
-import React, { PropTypes } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import {
   StyleSheet,
   Navigator,

package.json

@@ -38,7 +38,8 @@
   },
   "peerDependencies": {
     "react": "*",
-    "react-native": "*"
+    "react-native": "*",
+    "prop-types": "*"
   },
   "devDependencies": {
     "babel-eslint": "^6.0.4",