Bump version and add changelog

Author: ThexXTURBOXx

flutter_web_auth_2/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 4.0.2
+
+- 🌹 Improve README (additions to migration guide and Google scopes)
+
 ## 4.0.1
 
 - 🌹 Update `flutter_lints` to `5.x` - should not really change anything!

flutter_web_auth_2/pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_web_auth_2
 description: Flutter plugin for authenticating a user with a web service.
-version: 4.0.1
+version: 4.0.2
 homepage: https://github.com/ThexXTURBOXx/flutter_web_auth_2
 repository: https://github.com/ThexXTURBOXx/flutter_web_auth_2
 issue_tracker: https://github.com/ThexXTURBOXx/flutter_web_auth_2/issues