Use new `screen` export

[oliverjam]

As of today RTL exports screen, an object of all the query functions pre-bound to document.body. This means you don't have to use the return value of render anymore, which is a little less confusing for beginners.

import { render, screen } from '@testing-library/react'

test('example', () => {
  render(<Thing />);
  expect(screen.queryText(/not here/i)).toBeNull();
})

[oliverjam]

Fixed in a19a248