Merge pull request #3 from basakest/upgrade

feat: upgrade casbin to 3.1

Author: leeqvip

composer.json

@@ -11,7 +11,7 @@
     "license": "Apache-2.0",
     "require": {
     	"cakephp/cakephp": "3.*",
-    	"casbin/casbin": "0.*"
+    	"casbin/casbin": "~3.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0",