InputEvent inputType missing

[MonaMayrhofer]

If I am not mistaken, there is currently no way of accessing the inputType property of an InputEvent.

As it is defined in the W3C UI Events spec i think it should be included in this package.

If this is actually missing, and not just hidden somewhere where I didn't look, I would be willing to try myself on a PR.

[garyb]

Yup, looks like an omission here 👍