[0.1.1] - 2019/04/28 try to fix error for dart pub. [0.1.0] - 2019/04/28 add demo image [0.0.4] - 2019/04/28 try to fix error for dart pub. [0.0.3] - 2019/04/28 add flutter for environment on pubspec.yaml [0.0.2] - 2019/04/28 do flutter format and delete unused class. [0.0.1] - 2019/04/28 publish.