- https://github.com/share/sharedb/pull/695 — Fix `hasOwn()` for browsers missing this function (@welkinwong )

- https://github.com/share/sharedb/pull/693 — Hard rollback error for Presence (@dawidreedsy)

- https://github.com/share/sharedb/pull/691 — Remove redundant `type` unset (@dawidreedsy) - https://github.com/share/sharedb/pull/692 — Allow detection of op submission during a hard rollback (@dawidreedsy)

- https://github.com/share/sharedb/pull/686 — Fix `closed` check when handling `querySubscribe()` (@alecgibson)

- https://github.com/share/sharedb/pull/682 — Optionally skip committing no-ops to the database with `new Backend({doNotCommitNoOps: true})` (@alecgibson)

- https://github.com/share/sharedb/pull/679 — Presence broadcast performance improvement (@alecgibson)

- https://github.com/share/sharedb/pull/671 — Fix inflight/pending callback execution order (@benjismith)

- https://github.com/share/sharedb/pull/660 — Fix error handling in `_fetchCreateOpVersion()` (@alecgibson) - https://github.com/share/sharedb/pull/662 https://github.com/share/sharedb/pull/663 https://github.com/share/sharedb/pull/664 - Various test stability fixes