[fixed] use the correct babel presets combination.

.babelrc

@@ -1,21 +1,3 @@
 {
-  "presets": ["react"],
-  "env": {
-    "commonjs": {
-      "plugins": [
-        "transform-class-properties", 
-        "transform-object-rest-spread"
-      ],
-      "presets": ["env"]
-    },
-    "es": {
-      "plugins": [
-        "transform-class-properties", 
-        "transform-object-rest-spread"
-      ],
-      "presets": [
-        ["env", { "modules": false }]
-      ]
-    }
-  }
+  "presets": ["es2015", "stage-2", "react"]
 }

package.json

@@ -32,10 +32,9 @@
     "babel-core": "^6.25.0",
     "babel-eslint": "^7.1.1",
     "babel-loader": "^6.2.4",
-    "babel-plugin-transform-class-properties": "^6.24.1",
-    "babel-plugin-transform-object-rest-spread": "^6.23.0",
-    "babel-preset-env": "^1.5.2",
+    "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
+    "babel-preset-stage-2": "^6.24.1",
     "codeclimate-test-reporter": "^0.4.0",
     "coveralls": "^2.13.1",
     "cross-env": "^5.0.1",

specs/Modal.spec.js

@@ -3,7 +3,6 @@ import expect from 'expect';
 import React, { Component } from 'react';
 import ReactDOM from 'react-dom';
 import TestUtils from 'react-addons-test-utils';
-import createReactClass from 'create-react-class';
 import Modal from '../src/components/Modal';
 import * as ariaAppHider from '../src/helpers/ariaAppHider';
 import {
@@ -57,7 +56,7 @@ describe('State', () => {
 
   it('renders into the body, not in context', () => {
     const node = document.createElement('div');
-    const App = createReactClass({
+    class App extends Component {
       render() {
         return (
           <div>
@@ -67,7 +66,7 @@ describe('State', () => {
           </div>
         );
       }
-    });
+    }
     Modal.setAppElement(node);
     ReactDOM.render(<App />, node);
     expect(
@@ -357,22 +356,23 @@ describe('State', () => {
     const node = document.createElement('div');
     let modal = null;
 
-    const App = createReactClass({
-      getInitialState() {
-        return { testHasChanged: false };
-      },
+    class App extends Component {
+      constructor(props) {
+        super(props);
+        this.state = { testHasChanged: false };
+      }
 
       componentDidMount() {
         expect(modal.node.className).toEqual('myPortalClass');
 
         this.setState({
           testHasChanged: true
         });
-      },
+      }
 
       componentDidUpdate() {
         expect(modal.node.className).toEqual('myPortalClass-modifier');
-      },
+      }
 
       render() {
         const portalClassName = this.state.testHasChanged === true ?
@@ -389,7 +389,7 @@ describe('State', () => {
           </div>
         );
       }
-    });
+    }
 
     Modal.setAppElement(node);
     ReactDOM.render(<App />, node);