Bump flutter_inappwebview from 5.8.0 to 6.0.0 in /wallet

Bumps [flutter_inappwebview](https://github.com/pichillilorenzo/flutter_inappwebview) from 5.8.0 to 6.0.0.
- [Release notes](https://github.com/pichillilorenzo/flutter_inappwebview/releases)
- [Commits](pichillilorenzo/flutter_inappwebview@v5.8.0...v6.0.0)

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

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

wallet/pubspec.yaml

@@ -40,7 +40,7 @@ dependencies:
     sdk: flutter
   flutter_dotenv: ^5.0.2
   flutter_downloader: ^1.9.1
-  flutter_inappwebview: ^5.7.2+2
+  flutter_inappwebview: ^6.0.0
   flutter_local_notifications: ^13.0.0
   flutter_localizations:
     sdk: flutter