Merge pull request doctrine#6111 from derrabus/bugfix/pin-cs

Pin Slevomat Coding Standard

Author: greg0ire

composer.json

@@ -47,6 +47,7 @@
         "phpstan/phpstan-strict-rules": "^1.5",
         "phpunit/phpunit": "9.6.9",
         "psalm/plugin-phpunit": "0.18.4",
+        "slevomat/coding-standard": "8.13.1",
         "squizlabs/php_codesniffer": "3.7.2",
         "symfony/cache": "^5.4|^6.0",
         "symfony/console": "^4.4|^5.4|^6.0",