Update pubspec.yaml

Pubspec updated.

Author: Indumathi1195R

pubspec.yaml

@@ -14,16 +14,16 @@ description: A new Flutter application.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  syncfusion_flutter_calendar: ^18.2.47
+  syncfusion_flutter_calendar: ^19.1.56
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.3
+  cupertino_icons: ^1.0.2
 
 dev_dependencies:
   flutter_test: