Update flutter version

jeebb · jeebb · commit 50123699773a · 2020-08-03T20:39:44.000+07:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -6,6 +6,7 @@ homepage: https://github.com/jeebb/nhabe
 
 environment:
   sdk: ">=2.7.0 <3.0.0"
+  flutter: ">=1.12.0 <2.0.0"
 
 dependencies:
   flutter:
