update readme

Author: chavesgu

CHANGELOG.md

@@ -1,3 +1,5 @@
+## 1.3.1
+- update important readme
 ## 1.3.0
 - add huawei sdk for android decoder
 ## 1.2.0

README.md

@@ -76,6 +76,18 @@ String result = await Scan.parse(imagePath);
 ```dart
 controller.toggleTorchMode();
 ```
+### proguard-rules
+```
+-ignorewarnings
+-keepattributes *Annotation*
+-keepattributes Exceptions
+-keepattributes InnerClasses
+-keepattributes Signature
+-keepattributes SourceFile,LineNumberTable
+-keep class com.huawei.hianalytics.**{*;}
+-keep class com.huawei.updatesdk.**{*;}
+-keep class com.huawei.hms.**{*;}
+```
 
 # License
 MIT License

pubspec.yaml

@@ -1,6 +1,6 @@
 name: scan
 description: scan qrcode in widget tree.decode qrcode image from path.
-version: 1.3.0
+version: 1.3.1
 homepage: https://github.com/chavesgu/FlutterScan
 
 environment: