Importing a module member named `default` fails

Apparently [the following is valid ES2015](https://babeljs.io/repl/#?babili=false&evaluate=true&lineWrap=true&presets=latest&code=import%20%7B%20default%20%7D%20from%20'lib'%3B%0A):
```js
import { default } from 'lib';
```
But CoffeeScript [throws an error](http://coffeescript.org/#try:import%20%7B%20default%20%7D%20from%20'lib'):
```
Error on line 1: unexpected default
```