[🚀esl-event-listener]: POC ability to use array as a criteria for subscriptions filtering

[ala-n]

It is proposed to consider using arrays as a way to pass conjunction criteria for subscription filtering.

// Unsubscribes both _onEvent1 and _onEvent2
this.$$off([this._onEvent1, this._onEvent2]);

// Unsubscribes all click an keydown events
this.$$off(['click', 'keydown']);