release v1.6.0-stable

Author: hackware1993

CHANGELOG.md

@@ -1,3 +1,7 @@
+# v1.6.0-stable
+
+add open grammar support.
+
 # v1.5.2-stable
 
 remove dead code.

README.md

@@ -318,12 +318,12 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v1.5.2-stable'
+      ref: 'v1.6.0-stable'
 ```
 
 ```yaml
 dependencies:
-  flutter_constraintlayout: ^1.5.2-stable
+  flutter_constraintlayout: ^1.6.0-stable
 ```
 
 ```dart

README_CN.md

@@ -283,12 +283,12 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v1.5.2-stable'
+      ref: 'v1.6.0-stable'
 ```
 
 ```yaml
 dependencies:
-  flutter_constraintlayout: ^1.5.2-stable
+  flutter_constraintlayout: ^1.6.0-stable
 ```
 
 ```dart

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_constraintlayout
 description: A super powerful Stack, build flexible layouts with constraints. Similar to ConstraintLayout for Android and AutoLayout for iOS.
-version: 1.5.2-stable
+version: 1.6.0-stable
 anthor: hackware
 homepage: https://github.com/hackware1993/Flutter-ConstraintLayout