[AIT-287] Implement new rules for discarding ops buffered during sync#121

lawrence-forooghian wants to merge 2 commits intoAIT-324-apply-on-ACKably/ably-liveobjects-swift-plugin:AIT-324-apply-on-ACKfrom

AIT-287-new-rules-for-discarding-buffered-eventsably/ably-liveobjects-swift-plugin:AIT-287-new-rules-for-discarding-buffered-eventsCopy head branch name to clipboard