Merge pull request #75 from gabplch/chore/bump-phpstan-version

chore: bump phpstan version

Author: Yozhef

composer.json

@@ -34,7 +34,7 @@
     },
     "require-dev": {
         "ext-json": "*",
-        "phpstan/phpstan": "1.9.*",
+        "phpstan/phpstan": "1.11.*",
         "squizlabs/php_codesniffer": "3.7.*",
         "symfony/phpunit-bridge": "^3.4 || ^4.1.12 || ^5.0 || ^6.0 || ^7.0",
         "phpunit/phpunit": "^8.5 || ^9.0",