Update dependencies to latest

[wtorsi]

Routine dependency refresh on the 8.1 release line.

Changes

-    "phpunit/phpunit": "^13.0",
+    "phpunit/phpunit": "^13.3",
-    "phpstan/phpstan": "^2.1",
-    "phpstan/phpstan-symfony": "^2.0",
-    "phpstan/phpstan-doctrine": "^2.0",
-    "friendsofphp/php-cs-fixer": "^3.94"
+    "phpstan/phpstan": "^2.2",
+    "phpstan/phpstan-symfony": "^2.0.20",
+    "phpstan/phpstan-doctrine": "^2.0.28",
+    "friendsofphp/php-cs-fixer": "^3.95"

Verification (run locally against this branch)

• composer update resolves cleanly
• PHPStan 2.2 clean
• php-cs-fixer 3.95 clean
• PHPUnit suite passes

🤖 Generated with Claude Code

https://claude.ai/code/session_01BmAtkNHm7PmAohVqmFgnMq