Add CSS property writing-mode support

Hello!
I'm implementing your library in a project but the CSS property `writing-mode` seems to be ignored.

Here's the applied style:
```js
style: {
transform: 'rotate(180deg) ',
textAlign: 'right',
whiteSpace: 'nowrap',
overflow: 'visible',
textOverflow: 'visible',
fontSize: '9mm',
writingMode: 'vertical-rl' // This is ignored by @react-pdf/renderer
},
```

## Expected behaviour (rendered in browser without the library):
```html

```

## Actual behaviour (when generating PDF):
```html
ROTATED TEXT
```