* Expose an object's internal object ID, and allow fetching an object by its object ID
* Throw an exception if methods related to object IDs are used on non-synced Realms.
* Use `std::stoull` to ensure we can return the entire range of possible values.
* Add tests for _objectId() / _objectForObjectId().
* Adding change log
* Skip ObjectIdTests.testSynced for non-Node.
Mark Rowe