Send correct inputType when typing

[lindagruenwald]

When typing in an input field, the browser usually sends an input event with a specific inputType, e.g. "insertText" when adding characters, "deleteContentBackward" when backspacing, among others.

When using set or fill_in on a field, Cuprite is currently triggering the event in a way that leaves inputType as undefined, which is (unfortunately) what Chrome actually sends on autocompletion. The mostly correct way to trigger this event here should be with "insertText".

[route]

Let's see the tests ;)

[route]

Thanks!