updating imports (#30)

Author: Ishaan Parikh

index.js

@@ -1,6 +1,5 @@
-var React = require('react-native');
-var NativeModules = React.NativeModules;
-var Platform = React.Platform;
+import React from 'react';
+import {NativeModules, Platform} from 'react-native';
 var invariant = require('invariant');
 var RNCookieManagerIOS = NativeModules.RNCookieManagerIOS;
 var RNCookieManagerAndroid = NativeModules.RNCookieManagerAndroid;
@@ -28,4 +27,4 @@ var functions = [
 module.exports = {}
 for (var i=0; i < functions.length; i++) {
     module.exports[functions[i]] = CookieManager[functions[i]];
-}
+}