Add support for {once: true}

[fregante]

delegate-it/index.ts

Lines 117 to 118 in 719e834

	// Drop unsupported `once` option https://github.com/fregante/delegate-it/pull/28#discussion_r863467939
	delete listenerOptions.once;

[stof]

Even if you support it in the delegate-it API, you will still probably need to drop it from the native listener options due to sharing the native listener (see the ledger system)

[fregante]

Most definitely, even regardless of ledger, our listener is called many times so with once: true it would be removed before calling the user’s callback

delegate-it/index.ts

Lines 152 to 157 in 00b85c8

	const listenerFn = (event: Event): void => {
	const delegateTarget = safeClosest(event, selector);
	if (delegateTarget) {
	const delegateEvent = Object.assign(event, {delegateTarget});
	callback.call(baseElement, delegateEvent as DelegateEvent<GlobalEventHandlersEventMap[TEventType], TElement>);
	}