prep for publishing 0.15.2 (#205)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e9440f..725d157 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md

@@ -1,4 +1,4 @@
-## 0.15.2-dev
+## 0.15.2
 
 - Add additional types at the API boundary (in `lib/parser.dart` and others).
 - Adopted the `package:dart_flutter_team_lints` linting rules.

diff --git a/pubspec.yaml b/pubspec.yaml
index 2a61ef4..eb222a6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml

@@ -1,5 +1,5 @@
 name: html
-version: 0.15.2-dev
+version: 0.15.2
 description: APIs for parsing and manipulating HTML content outside the browser.
 repository: https://github.com/dart-lang/html