⬆️ Raise dart sdk minimum version.

AlexV525 · AlexV525 · commit 092b1bb84830 · 2020-05-21T18:09:53.000+08:00
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.8.0 <3.0.0"
+  sdk: ">=2.8.1 <3.0.0"
   flutter: ">=1.17.0 <2.0.0"
 
 dependencies:
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 1.7.0
 homepage: https://github.com/fluttercandies/flutter_wechat_assets_picker
 
 environment:
-  sdk: ">=2.8.0 <3.0.0"
+  sdk: ">=2.8.1 <3.0.0"
   flutter: ">=1.17.0 <2.0.0"
 
 dependencies:
