修改版本依赖

pubspec.yaml

@@ -4,8 +4,9 @@ version: 0.0.1
 homepage:
 
 environment:
-  sdk: '>=3.1.2 <4.0.0'
-  flutter: '>=3.3.0'
+  sdk: ">=2.17.0 <3.0.0"
+  flutter: ">=2.5.0 <4.0.0"
+
 
 dependencies:
   flutter: