Updated packages and version increse

pubspec.yaml

@@ -1,24 +1,25 @@
 name: pluto_grid_plus
-description: PlutoGrid plus is a maintained version of PlutoGrid, PlutoGrid is a dataGrid that can be controlled by the keyboard on desktop and web. Of course, it works well on Android and IOS. (DataGrid, DataTable, Data Grid, Data Table, Sticky)
-version: 8.4.3
+description: PlutoGrid plus is a maintained version of PlutoGrid, PlutoGrid is a
+    dataGrid that can be controlled by the keyboard on desktop and web. Of course,
+    it works well on Android and IOS. (DataGrid, DataTable, Data Grid, Data Table,
+    Sticky)
+version: 8.4.4
 homepage: https://pluto.weblaze.dev
 repository: https://github.com/doonfrs/pluto_grid_plus
 
 environment:
-  sdk: ^3.0.0
+    sdk: ^3.0.0
 
 dependencies:
-  flutter:
-    sdk: flutter
-  # Follows the intl version included in Flutter.
-  # https://github.com/flutter/flutter/blob/84a1e904f44f9b0e9c4510138010edcc653163f8/packages/flutter_localizations/pubspec.yaml#L11
-  intl: ^0.20.0
-  rxdart: ^0.28.0
-  collection: ^1.18.0
+    flutter:
+        sdk: flutter
+    intl: ^0.19.0
+    rxdart: ^0.28.0
+    collection: ^1.19.0
 
 dev_dependencies:
-  flutter_test:
-    sdk: flutter
-  mockito: ^5.4.3
-  build_runner: ^2.4.7
-  flutter_lints: ^5.0.0
+    build_runner: ^2.4.7
+    flutter_lints: ^5.0.0
+    flutter_test:
+        sdk: flutter
+    mockito: ^5.4.3