Update sdk version: '>=3.2.6 <4.0.0'

Author: h65wang

example/pubspec.yaml

@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: '>=3.2.6 <4.0.0'
 
 dependencies:
   flutter:

pubspec.yaml

@@ -4,8 +4,7 @@ version: 0.3.5
 homepage: https://github.com/h65wang/flutter-interactive-chart
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
-  flutter: ">=1.17.0"
+  sdk: '>=3.2.6 <4.0.0'
 
 dependencies:
   flutter: