Mention CancelableCompleter in the CHANGELOG.

R=lrn@google.com

Review URL: https://codereview.chromium.org//1415393004 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5801872..4cdfc6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@
 - Added `AsyncMemoizer.future`, which allows the result to be accessed before
   `runOnce()` is called.
 
+- Added `CancelableOperation`, an asynchronous operation that can be canceled.
+  It can be created using a `CancelableCompleter`.
+
 - Added `RestartableTimer`, a non-periodic timer that can be reset over and
   over.
 
diff --git a/lib/src/cancelable_operation.dart b/lib/src/cancelable_operation.dart
index a7fe6a8..89889a3 100644
--- a/lib/src/cancelable_operation.dart
+++ b/lib/src/cancelable_operation.dart
@@ -8,7 +8,7 @@
 
 import 'package:async/async.dart';
 
-/// An asynchronuos operation that can be cancelled.
+/// An asynchronous operation that can be cancelled.
 ///
 /// The value of this operation is exposed as [value]. When this operation is
 /// cancelled, [value] won't complete either successfully or with an error. If
diff --git a/pubspec.yaml b/pubspec.yaml
index 91d752d..8c02a7a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: async
-version: 1.4.0
+version: 1.4.1-dev
 author: Dart Team <misc@dartlang.org>
 description: Utility functions and classes related to the 'dart:async' library.
 homepage: https://www.github.com/dart-lang/async