Bump flutter_local_notifications from 13.0.0 to 15.1.1 in /wallet

Bumps [flutter_local_notifications](https://github.com/MaikuB/flutter_local_notifications) from 13.0.0 to 15.1.1.
- [Release notes](https://github.com/MaikuB/flutter_local_notifications/releases)
- [Commits](MaikuB/flutter_local_notifications@flutter_local_notifications-v13.0.0...flutter_local_notifications-v15.1.1)

---
updated-dependencies:
- dependency-name: flutter_local_notifications
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

wallet/pubspec.yaml

@@ -41,7 +41,7 @@ dependencies:
   flutter_dotenv: ^5.0.2
   flutter_downloader: ^1.9.1
   flutter_inappwebview: ^5.7.2+2
-  flutter_local_notifications: ^13.0.0
+  flutter_local_notifications: ^15.1.1
   flutter_localizations:
     sdk: flutter
   flutter_mobx: ^2.0.1