fix: package:flutter_gen is deprecated

fulleni · fulleni · commit 97077d9869ac · 2025-03-14T07:26:10.000+01:00
diff --git a/l10n.yaml b/l10n.yaml
@@ -2,3 +2,4 @@ arb-dir: lib/l10n/arb
 template-arb-file: app_en.arb
 output-localization-file: app_localizations.dart
 nullable-getter: false
+synthetic-package: false
