update to flutter 3.21

pubspec.yaml

@@ -13,7 +13,13 @@ dependencies:
   flutter_localizations:
     sdk: flutter
   cupertino_icons: ^1.0.6
-  intl: ^0.18.1
+  # intl: ^0.18.1
+  # humanizer: ^2.2.0
+  intl: ^0.19.0
+  humanizer:
+    git:
+      url: https://github.com/alex-relov/humanizer
+      ref: up-version
   slang: ^3.30.1
   slang_flutter: ^3.30.0
   fpdart: ^1.1.0
@@ -59,11 +65,7 @@ dependencies:
   percent_indicator: ^4.2.3
   sliver_tools: ^0.2.12
   flutter_adaptive_scaffold: ^0.1.8
-  humanizer: ^2.2.0
-  # humanizer:
-  #   git:
-  #     url: https://github.com/alex-relov/humanizer
-  #     ref: up-version
+
   upgrader: ^9.0.0
   toastification: ^1.2.1
   version: ^3.0.2