Fragment usage

I'm trying to render a list [as shown in the example](https://github.com/forgojs/forgo#rendering-lists-and-using-keys) but it assumes rendering a single element.

```
const list = [
{ key: 'a', value: '1' },
{ key: 'b', value: '2' }
];

const Example = () => new forgo.Component({
render() {
return list.map(item => [

{item.key}

,

{item.value}

])
}
});
```

In React, you could wrap listed items like this into a fragment which you can attach a key to.

```
return list.map(item => [

{[

{item.key}

,

{item.value}

]}

])
```

How would you do this in forgo?