Better implement `removeListeners` when they are no longer needed

[Taym95]

hamid.js/src/lib.ts

Line 14 in da25336

window.addEventListener(evt, this.eventHandler(this.kickOutFn, this.defaultTimerInSeconds)); // TODO test "this" scope

[Fcmam5]

It is on my TODOs, I will expose a cleanup API to unregister these listeners