修改版本依赖

603aa84b · 祁增奎 · 56f65715 · 603aa84b
--- a/pubspec.yaml
+++ b/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: