Bump dev dependencies

Author: janlanger

composer.json

@@ -32,7 +32,7 @@
 		"php-parallel-lint/php-parallel-lint": "^1.2",
 		"phpstan/phpstan": "^0.12.37",
 		"phpstan/phpstan-phpunit": "^0.12.16",
-		"phpunit/phpunit": "^8.5.2 || ^9.3.7",
+		"phpunit/phpunit": "^8.5.14 || ^9.3.7",
 		"slevomat/coding-standard": "^6.3.10",
 		"squizlabs/php_codesniffer": "^3.5.6"
 	},