Merge pull request #14 from php-casbin/leeqvip-patch-1

fix: add workerman/redis 2.0

Author: leeqvip

composer.json

@@ -26,7 +26,7 @@
     "topthink/think-orm": "^2.0",
     "php-di/php-di": "^6.3",
     "doctrine/annotations": "^1.13",
-    "workerman/redis": "^1.0"
+    "workerman/redis": "^1.0|^2.0"
   },
   "autoload": {
     "psr-4": {