Update composer.json

Author: limingxinleo

composer.json

@@ -32,7 +32,7 @@
         "friendsofphp/php-cs-fixer": "^2.14",
         "mockery/mockery": "^1.0",
         "doctrine/common": "^2.9",
-        "phpstan/phpstan": "^0.11.2",
+        "phpstan/phpstan": "^0.12",
         "hyperf/devtool": "~2.0.0",
         "hyperf/testing": "~2.0.0"
     },