implement new method awaitedOps in favor of awaitedDeletes/awaitedInserts. This will fix some bugs when the type gets out of sync with the state of yjs

all tests working. Fixed an older bug: When gc an op I forgot to update the state. This only affected offline editing, and was very hard to catch in the past

fixed several issues of the gc. I.e. the gc sometimes did not collect the whole subtree when deleting an operation

from worst case of O(n) -> O(1) - where n is the number of insertions in
a list

So this is a huge improvement, I guess :)

* found a bug in EventHelper
* reduce wait() calls