Does not appear to handle multiple children properly

Whenever I'm using this module, it never seems to get past the first child. For example:

``` js
export function render() {
  return (
    <ul>
      <li>1</li>
      <li>2</li>
      <li>3</li>
    </ul>
  );
}
```

I only get the `<ul>` and the first `<li>`. If I switch to `dekujs/virtual-element`, it works as expected.
