[Bug] Data-down triggers native Change Event

Hi :wave:

We were trying to use the Change Event on the PikadayInput Component et we were surprised to see the event triggered on data-down.

When debugging the issue, we can follow easily the stack trace down to these codes blocks:
https://github.com/adopted-ember-addons/ember-pikaday/blob/9a3fae61ed33151b9c377a324fd711c19d61732a/src/modifiers/pikaday.js#L59
https://github.com/adopted-ember-addons/ember-pikaday/blob/9a3fae61ed33151b9c377a324fd711c19d61732a/vendor/pikaday.js#L832

As the W3C Specs point out, the Change Event is to be triggered only on user conscious input (leaving a non-validated input, checking a radio button, selecting/changing the date of a date input, etc...).
https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/change_event
https://html.spec.whatwg.org/multipage/input.html#concept-input-apply

Is it a wrong use on your side of Pikaday's Api or rather on their implementation?