Version 5.0.0 includes bugfixes that may in rare cases cause breaking changes if relying on undocumented behavior. Most apps should be able to upgrade without problems. Please file an issue if you upgrade and it causes any new bugs.
isPlainObject() supports objects from another window (#1584 by @ConneXNL)
• Models from snapshot processors can now be added to maps (#1581 by @kidroca)
applyPatch can now replace root of store if path is empty (#1522 by @epodgaetskiy)