Bump codesniffer version

Author: lookyman

composer.json

@@ -31,7 +31,8 @@
     "phpstan/phpstan-strict-rules": "^0.11",
     "slevomat/coding-standard": "^4.5.2",
     "phpstan/phpstan-phpunit": "^0.11",
-    "symfony/framework-bundle": "^3.0 || ^4.0"
+    "symfony/framework-bundle": "^3.0 || ^4.0",
+    "squizlabs/php_codesniffer": "^3.3.2"
   },
   "conflict": {
     "symfony/framework-bundle": "<3.0"