Update phpstan/phpstan to version 2.x

Bumped the phpstan/phpstan dependency from ^1.0 to ^2.0 in composer.json to use the latest features and improvements.

Author: huangdijia

composer.json

@@ -30,7 +30,7 @@
         "hyperf/devtool": "~3.1.0",
         "hyperf/testing": "~3.1.0",
         "mockery/mockery": "^1.0",
-        "phpstan/phpstan": "^1.0",
+        "phpstan/phpstan": "^2.0",
         "swoole/ide-helper": "^5.0"
     },
     "suggest": {