Bump version and add changelog

Author: ThexXTURBOXx

flutter_web_auth_2/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 5.0.0-alpha.2
+
+- 💥 Even newer Android authentication approach (Thanks to [@titanous](https://github.com/titanous) in [#163](https://github.com/ThexXTURBOXx/flutter_web_auth_2/pull/163))
+
 ## 5.0.0-alpha.1
 
 - 🌹 Added migration guide for `5.x` and updated migration guide for `4.x`

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: 5.0.0-alpha.1
+version: 5.0.0-alpha.2
 resolution: workspace
 homepage: https://github.com/ThexXTURBOXx/flutter_web_auth_2
 repository: https://github.com/ThexXTURBOXx/flutter_web_auth_2