Bump min sdk version

Author: rolandgeider

pubspec.yaml

@@ -24,7 +24,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.5.4+31
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
   flutter: