Revert "chore: Bump version to 1.3.0"

This reverts commit 10043c3.

Author: anitta-keyvalue

pubspec.yaml

@@ -1,6 +1,6 @@
 name: sirenapp_flutter_inbox
 description: "Flutter SDK tailored for creating and managing in-app notification inboxes."
-version: 1.3.0
+version: 1.2.1
 homepage: 'https://github.com/KeyValueSoftwareSystems/siren-flutter-inbox#readme'
 repository: 'https://github.com/KeyValueSoftwareSystems/siren-flutter-inbox'
 license: MIT