Implement pattern.setTransform()

```js
const pattern = context.createPattern(image, 'repeat');
pattern.setTransform() // `setTransform` is undefined.
// etc.
```

I checked the type definition, `setTransform` function is there.

Few questions.
1. Is this issue of type def file ?
2. if yes, then how I can set `patternTransform` attribute into the pattern ?

[BTW, the code is working. But I need to add the `patternTransform` property ]