[Feature]: add container to the exported API

[ematipico]

import Button from 'Button.svelte';
import {render} from 'svelte-testing-library'

const { container } = render(Button);

//..

expect(container.firstChild).toMatchSnapshot();

This will allow to create snapshot tests in a easier way. It could be a nice addition as other testing-library libraries export it. I know it's possible to use document.body but it's not intuitive and not easy for new comers

[benmonro]

🎉 This issue has been resolved in version 1.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀