Release metatest 0.2.2+2.

The versions got kind of wonky for a while. This backfills the changelog
as best as possible to represent the versions actually released on
pub.dartlang.org. It also releases a new version with pending changes
included.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1946033002 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb7ec70..1e88181 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,8 @@
-# 0.2.1+2
+# 0.2.2+2
 
 * Compatibility with the latest `test`.
 
-# 0.2.1+1
+# 0.2.2+1
 
 * Require `test` version `0.12.5`.
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 78f13eb..110079c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: metatest
-version: 0.2.2+1
+version: 0.2.2+2
 author: Dart Team <misc@dartlang.org>
 description: A package for testing Dart test frameworks.
 homepage: https://github.com/dart-lang/metatest