[fix] top-level API exports

Also fixes importing these APIs from 'react-native' when used with the
Babel plugin.

src/apis/AppRegistry/index.js

@@ -11,7 +11,7 @@
  */
 
 import invariant from 'fbjs/lib/invariant';
-import { unmountComponentAtNode } from 'react-dom';
+import { unmountComponentAtNode } from '../../modules/unmountComponentAtNode';
 import renderApplication, { getApplication } from './renderApplication';
 import type { ComponentType } from 'react';
 

src/module.js

@@ -2,7 +2,8 @@ import createElement from './modules/createElement';
 import findNodeHandle from './modules/findNodeHandle';
 import NativeModules from './modules/NativeModules';
 import processColor from './modules/processColor';
-import { hydrate, render, unmountComponentAtNode } from 'react-dom';
+import render from './modules/render';
+import unmountComponentAtNode from './modules/unmountComponentAtNode';
 
 // APIs
 import Animated from './apis/Animated';
@@ -63,7 +64,6 @@ import ViewPropTypes from './components/View/ViewPropTypes';
 export {
   // top-level API
   findNodeHandle,
-  hydrate,
   render,
   unmountComponentAtNode,
   // modules
@@ -128,7 +128,6 @@ export {
 const ReactNative = {
   // top-level API
   findNodeHandle,
-  hydrate,
   render,
   unmountComponentAtNode,
 

src/modules/render/index.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2016-present, Nicolas Gallagher.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ */
+
+import { render } from 'react-dom';
+export default render;

src/modules/unmountComponentAtNode/index.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2016-present, Nicolas Gallagher.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @noflow
+ */
+
+import { unmountComponentAtNode } from 'react-dom';
+export default unmountComponentAtNode;