update version and readme

CHANGELOG.md

+## 1.1.8
+# support android embedding v2 api
+# add extraText option for android Intent.EXTRA_TEXT when sharing image or file.
+
 ## 1.1.7
 * set default popover point on the ipad
 

README-en.md

@@ -12,7 +12,7 @@ First, add `share_extend` as a dependency in your pubspec.yaml file.
 
 ```
 dependencies:
-  share_extend: "^1.1.7"
+  share_extend: "^1.1.8"
 ```
 
 ### iOS

README.md

@@ -10,7 +10,7 @@ Language: [English](https://github.com/zhouteng0217/ShareExtend/blob/master/READ
 
 ```
 dependencies:
-  share_extend: "^1.1.7"
+  share_extend: "^1.1.8"
 ```
 
 ### iOS

pubspec.yaml

 name: share_extend
 description: A Flutter plugin for Android and iOS for sharing text, image, video and file with system ui.
-version: 1.1.7
+version: 1.1.8
 author: zhouteng <qfszyq@gmail.com>
 homepage: https://github.com/zhouteng0217/ShareExtend
 
 environment:
   sdk: ">=2.0.0 <3.0.0"
+  flutter: ">=1.10.0 <2.0.0"
 
 dependencies:
   meta: ^1.0.5