feat: Support for 3.x (fix #7)

Author: leeqvip

.phpunit.result.cache

@@ -0,0 +1 @@
+C:37:"PHPUnit\Runner\DefaultTestResultCache":458:{a:2:{s:7:"defects";a:0:{}s:5:"times";a:8:{s:33:"Tests\AdapterTest::testLoadPolicy";d:0.7;s:41:"Tests\AdapterTest::testLoadFilteredPolicy";d:0.049;s:32:"Tests\AdapterTest::testAddPolicy";d:0.034;s:34:"Tests\AdapterTest::testAddPolicies";d:0.048;s:33:"Tests\AdapterTest::testSavePolicy";d:0.029;s:35:"Tests\AdapterTest::testRemovePolicy";d:0.032;s:37:"Tests\AdapterTest::testRemovePolicies";d:0.027;s:43:"Tests\AdapterTest::testRemoveFilteredPolicy";d:0.031;}}}

composer.json

@@ -10,11 +10,11 @@
     ],
     "license": "Apache-2.0",
     "require": {
-        "casbin/casbin": "^2.0",
+        "casbin/casbin": "^3.0",
         "techone/database": "^0.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "~7.0",
+        "phpunit/phpunit": "~7.0|~8.0|~9.0",
         "php-coveralls/php-coveralls": "^2.1"
     },
     "autoload": {