Wrap change handler in Ember.run.
Wrap change handler in Ember.run.

This is the expected behavior for any async callback in an Ember app. It allows
Ember to schedule the callback in its runloop and prevents errors when running
tests.

fivetanley/ember-pouch,keppy/ember-pouch,nolanlawson/ember-pouch,stevebest/ember-pouch,mattmarcum/ember-pouch,atsjj/ember-pouch,HospitalRun/ember-pouch,keppy/ember-pouch,atsjj/ember-pouch,OleRoel/ember-pouch,rsutphin/ember-pouch,leojpod/ember-pouch,nolanlawson/ember-pouch,HospitalRun/ember-pouch,mattmarcum/ember-pouch,greyhwndz/ember-pouch,fivetanley/ember-pouch,leojpod/ember-pouch,greyhwndz/ember-pouch,olivierchatry/ember-pouch,pouchdb-community/ember-pouch,stevebest/ember-pouch,olivierchatry/ember-pouch,pouchdb-community/ember-pouch,rsutphin/ember-pouch,OleRoel/ember-pouch