Merge pull request #602 from doctrine/dependabot/composer/4.3.x/phpstan/phpstan-2.1.56

Update phpstan/phpstan requirement from 2.1.55 to 2.1.56

Author: greg0ire

composer.json

@@ -38,7 +38,7 @@
     },
     "require-dev": {
         "doctrine/coding-standard": "14.0.0",
-        "phpstan/phpstan": "2.1.55",
+        "phpstan/phpstan": "2.1.56",
         "phpunit/phpunit": "^10.5.38 || 11.4.14"
     },
     "conflict": {