Breakpoints should work with pseudo elements

API should be:

```js
<Ook
  after={{
    content: 'Eek!',
    position: 'absolute',
    top: '100%',
    right: '0px',
    width: {
      d: '200px',
      l: '600px
    },
    height: '100px',
    background: 'green',
  }}
/>
```