Fix module importing

Author: typical000

README.md

@@ -9,7 +9,7 @@ https://github.com/necolas/normalize.css
 import jss from 'jss'
 import normalize from 'jss-normalize'
 
-jss.createStyleSheet(normalize).attach()
+jss.createStyleSheet(normalize, {named: false}).attach()
 ```````````````````
 
 #### You must know

index.js

@@ -10,7 +10,7 @@
  * Anyway, you can use a preset (https://github.com/cssinjs/jss-preset-default) for a quick setup with default plugins.
  */
 
-export default {
+module.exports = {
 
   /**
    * 1. Change the default font family in all browsers (opinionated).