Call update on render when component is not in DOM

I was playing around with `nanocomponent` and `component-box` as possible target solution for jsx compilation and stumbled upon an issue.
Sometimes we may expect updaing a component state by calling `render`, even when the component is not in the DOM, eg.

```js
let menu = new Menu()

// these render calls do not incur update call
menu.render({ content: 'Home' })
menu.render({ content: ['A', 'B'] })

document.body.appendChild(menu.render())
```

Does it make any sense to invoke `update` even for detached components? We can imagine some components not dealing with DOM at all.