prepare for release

pkgs/pool/CHANGELOG.md

diff --git a/pkgs/pool/CHANGELOG.md b/pkgs/pool/CHANGELOG.md
index d9db81c..84b72c0 100644
--- a/pkgs/pool/CHANGELOG.md
+++ b/pkgs/pool/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.3.4
+
+* Modify code to eliminate Future flattening.
+
 ## 1.3.3
 
 * Declare support for `async` 2.0.0.

pkgs/pool/pubspec.yaml

diff --git a/pkgs/pool/pubspec.yaml b/pkgs/pool/pubspec.yaml
index 08f3b70..a5f0434 100644
--- a/pkgs/pool/pubspec.yaml
+++ b/pkgs/pool/pubspec.yaml
@@ -1,5 +1,5 @@
 name: pool
-version: 1.3.3-dev
+version: 1.3.4
 author: Dart Team <misc@dartlang.org>
 description: A class for managing a finite pool of resources.
 homepage: https://github.com/dart-lang/pool