Memory leak

[MurkyMeow]

Hey! Absolutely solid work on this library! I've been using it extensively in my finance-related project and it's been a pleasure.

I've noticed a memory leak in my app and traced it down to this line in this library:

      await Promise.race([
            ownNextEventDeferred.promise, // <- this promise is reused, .then() chained onto it infinitely
            sharedNextEventDeferred.promise, // <- this promise is resolved and re-created, all ok
          ]);

I have it fixed here!

[shtaif]

Hey @MurkyMeow!
Really glad (and surprised) to learn that some one else but me actually found this valuable.
Kindly allow me just an extra day or two to sit down to fully comprehend and address this.
Thanks a lot for the help!! ⭐