Bump version to 1.3.0.

Author: hsluoyz

README.md

@@ -117,7 +117,7 @@ For Maven:
 <dependency>
   <groupId>org.casbin</groupId>
   <artifactId>jcasbin</artifactId>
-  <version>1.2.0</version>
+  <version>1.3.0</version>
 </dependency>
 ```
 

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.casbin</groupId>
     <artifactId>jcasbin</artifactId>
-    <version>1.2.0</version>
+    <version>1.3.0</version>
 
     <name>JCasbin Authorization Library</name>
     <description>An authorization library that supports access control models like ACL, RBAC, ABAC in Java</description>