update event tests based on changes in vue-next

[rigor789]

replace nextTick with a timeout helper

nativescript-vue-next/packages/runtime/__tests__/modules/events.spec.ts

Lines 15 to 19 in 1698318

	await nextTick()
	el.dispatchEvent(event)
	await nextTick()
	el.dispatchEvent(event)
	await nextTick()

ref: vuejs/core@8357895