Allow adding custom event listeners.

[eiswind]

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In JSDOMBuilder event listeners get added by setEvent.

else -> path.last().setEvent(event, value)

In case of a vaadin-text-field, that needs a custom 'change' event however this does not work. It does work when I add the listener like

else -> path.last().addEventListener(event, value)

Is there a chance to add a method like this in JSDOMBuilder/TagConsumer?