Rename runAsync to scheduleMicrotask.

pkg/observe/lib/src/change_notifier.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of observe;
 
 /**
  * Base class implementing [Observable] object that performs its own change
  * notifications, and does not need to be considered by [Observable.dirtyCheck].
  *
@@ skipping 67 matching lines @@
    *     }
    */
   notifyPropertyChange(Symbol field, Object oldValue, Object newValue)
       => _notifyPropertyChange(this, field, oldValue, newValue);
 
   void notifyChange(ChangeRecord record) {
     if (!hasObservers) return;
 
     if (_records == null) {
       _records = [];
-      runAsync(deliverChanges);
+      scheduleMicrotask(deliverChanges);
     }
     _records.add(record);
   }
 }