use onBeforeUnmount in useEventListener

[bnabriss]

use onBeforeUnmount in useEventListener instead of onUnmounted since onUnmounted will not work if you trying to pass some element ref from the consumer component. Using the onUnmounted the ref will be null since the component is unmounted, so we should use onBeforeUnmount

Description of Problem

using will throw an error:

Cannot read properties of null (reading 'removeEventListener')

if you use Element ref

Proposed Solution

Use onBeforeUnmount, no remove the listener just before destroying the component

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[NataliaTepluhina]

@bnabriss thank you, that's a good point!