fix: support php8.0 (#1)

* support php8.0

* support php8.0

Co-authored-by: 超超 <[email protected]>

Author: shine96

composer.json

@@ -18,7 +18,7 @@
     "license": "Apache-2.0",
     "require": {
         "casbin/casbin": "^2.0|^3.0",
-        "psr/log": "^1.1"
+        "psr/log": "^1.1|^2.0|^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~7.0|~8.0",