Update PointerEvent to have default width / height set to 1

[chuganzy]

What:

This PR updates PointerEvent to have default width / height set to 1 as per the spec.

• https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent/width
• https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent/height

Why:

new PointerEvent('xxx') on most browser implementations should set them 1 by default.

Also some libraries check if a pointer event is virtual or not by looking at the geometry values, while we expect this library to work exactly as the actual interactions.

• ex: Floating UI

How:

Just use 1 as default values on them.

Checklist:

• [x] Documentation
  • Not needed?
• [x] Tests
• [x] Ready to be merged

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