found another bug that only happens in persistent databases (operationAdded changes an operation, so it needs to be retrieved again after calling it)

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 one more problem with ds & fixed ace example & insertions are combined even when created in different execution tasks

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

Remove that single \`for.. in\` loop that appearantly causes troubles for istvan (why am I fixing this again?) fixes #46

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