externalCache adapter was deprecated in 0.8, write your own adapter instead by recipe.
Events finished.* have never been supposed to be called in application code. Now they are read-only. In case you call them, you will get a warning in console in Effector 22 and exception in Effector 23.
Stores $data, $error, $status, $idle, $pending, $succeeded, $failed, $enabled have never been supposed to be changed in application code directly. Now they are read-only. In case you change them, you will get a warning in console in Effector 22 and exception in Effector 23.