Fixed React 15.5.0 propTypes deprecation warning.

Author: Sebastian Mader

package.json

@@ -41,6 +41,7 @@
     "eslint": "^1.6.0",
     "eslint-config-airbnb": "^0.1.0",
     "eslint-plugin-react": "^3.5.1",
+    "prop-types": "^15.5.8",
     "react": "^0.14.0",
     "react-dom": "^0.14.0",
     "rifraf": "^2.0.2",

src/NativeListener.js

@@ -1,4 +1,5 @@
-import {Component, PropTypes} from 'react';
+import {Component} from 'react';
+import PropTypes from 'prop-types';
 import ReactDOM from 'react-dom';
 const events = [
   'KeyDown',