onerror for Elements is incorrect

[trusktr]

const img = document.createElement('img')

// type error:
img.onerror = (e: Event) => e

playground

Only Window.onerror should have the alternative signature, but not elements. See:

• https://developer.mozilla.org/en-US/docs/Web/API/Window/error_event
• https://udn.realityripple.com/docs/Web/API/GlobalEventHandlers/onerror