Prepare release with topics (#160)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d924b0..9c4e9fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
-## 0.8.8-dev
+## 0.8.8
 
 - Require Dart 2.19
+- Add topics in `pubspec.yaml`.
 
 ## 0.8.7
 
diff --git a/pubspec.yaml b/pubspec.yaml
index b3023cc..a0b3a97 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,8 +1,11 @@
 name: gcloud
-version: 0.8.8-dev
+version: 0.8.8
 description: >-
   High level idiomatic Dart API for Google Cloud Storage, Pub-Sub and Datastore.
 repository: https://github.com/dart-lang/gcloud
+topics:
+ - cloud
+ - gcp
 
 environment:
   sdk: '>=2.19.0 <3.0.0'