typeIn helper triggers all key-related events, even if preventDefault is called

The `typeIn` helper always triggers all of the key-related events (`keydown`, `keypress`, `input`, and `keyup`) regardless of whether `event.preventDefault()` was called. This makes the helper work differently than actual browser input in a few cases:

* When a `keydown` handler calls `preventDefault`, only the `keydown` and `keyup` events are triggered
* When a `keypress` handler calls `preventDefault`, an `input` event is not triggered

Calling `preventDefault` in a `keyup` or `input` handler has no effect on which events are triggered.

(Tested with Chrome 84.0.4147.105 and Firefox 79.0.)