This release fixes a number of bugs related to deferred updates and computed observables.
- stop infinite loop from dirty events in circular computeds (#1943)
- only update a computed if dependency has actually changed; not if it was just dirty (#2174)
- only notify subscriptions that exist when a change occurs; don't notify future subscribers (#2163)
- notify dependent computed of change in reverted observable if the computed previously read a different intermediate value (#1835)
- update a pure computed if a dependency has changed and notification is pending (#2197)