bump to 1.0.0

pubspec.yaml

 name: fluwx
 description: A implement of WeChatSDK on Flutter.Fluwx makes possible using WeChatSDK in Flutter.Enjoy sharing or payment in Flutter.
-version: 0.6.3
+version: 1.0.0
 author: JarvanMo <jarvan.mo@gmail.com>
 homepage: https://github.com/JarvanMo/fluwx
 
 environment:
-   sdk: ">=2.0.0-dev.58.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
+
 dependencies:
   flutter:
     sdk: flutter
 
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
 # For information on the generic Dart part of this file, see the
 # following page: https://www.dartlang.org/tools/pub/pubspec