Merge branch 'master' of https://git.yoqi.me/lyq/flutter_get_demo

pubspec.yaml

@@ -4,7 +4,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=3.0.0-21.0.dev <4.0.0'
+  sdk: '>=2.19.2 <3.0.0'
 
 dependencies:
   flutter: