Update SDK, New add clear c2c message android group message

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 1.0.4
+
+New add clear c2c message and group message </bar>
+Update sdk to 1.1.9
+
 ## 1.0.3
 
 Fix android message error bug </br>

README.md

@@ -14,7 +14,7 @@ A flutter IM plugin for android and ios.
 
 #### 1，Add dependency in yaml
 
-       flutter_openim_sdk: ^1.0.3
+       flutter_openim_sdk: ^1.0.4
 
 #### 2，Import package
 

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_openim_sdk
 description: An instant messaging plug-in that supports Android and IOS. And the server is also all open source.
-version: 1.0.3
+version: 1.0.4
 homepage: https://www.rentsoft.cn
 repository: https://github.com/OpenIMSDK/Open-IM-SDK-Flutter