fix windows watch options

webpack.config.js

@@ -1,26 +1,30 @@
 module.exports = {
-  entry: [
-    './src/index.js'
-  ],
+  entry: ['./src/index.js'],
   output: {
     path: __dirname,
     publicPath: '/',
     filename: 'bundle.js'
   },
   module: {
-    loaders: [{
-      exclude: /node_modules/,
-      loader: 'babel',
-      query: {
-        presets: ['react', 'es2015', 'stage-1']
+    loaders: [
+      {
+        exclude: /node_modules/,
+        loader: 'babel',
+        query: {
+          presets: ['react', 'es2015', 'stage-1']
+        }
       }
-    }]
+    ]
   },
   resolve: {
     extensions: ['', '.js', '.jsx']
   },
   devServer: {
     historyApiFallback: true,
-    contentBase: './'
+    contentBase: './',
+    watchOptions: {
+      aggregateTimeout: 300,
+      poll: 1000
+    }
   }
 };