googleapis_auth: prepare v2.2.0 (#732)

googleapis_auth/CHANGELOG.md

diff --git a/googleapis_auth/CHANGELOG.md b/googleapis_auth/CHANGELOG.md
index ac6bd32..06fcb3f 100644
--- a/googleapis_auth/CHANGELOG.md
+++ b/googleapis_auth/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.2.0-wip
+## 2.2.0
 
 - Added `quotaProject` support to existing credentials classes
   (`ServiceAccountCredentials`, `ClientViaServiceAccount`, `ClientFromFlow`).

googleapis_auth/pubspec.yaml

diff --git a/googleapis_auth/pubspec.yaml b/googleapis_auth/pubspec.yaml
index e9674a8..aa9dd4a 100644
--- a/googleapis_auth/pubspec.yaml
+++ b/googleapis_auth/pubspec.yaml
@@ -1,5 +1,5 @@
 name: googleapis_auth
-version: 2.2.0-wip
+version: 2.2.0
 description: Obtain Access credentials for Google services using OAuth 2.0
 repository: https://github.com/google/googleapis.dart/tree/master/googleapis_auth