Revert "Update require-dev packages"

This reverts commit ce6420e.

Author: kitar

composer.json

@@ -29,8 +29,8 @@
     },
     "require-dev": {
         "illuminate/auth": "^6.0|^7.0|^8.0|^9.0",
-        "symfony/var-dumper": "^6.0",
-        "vlucas/phpdotenv": "^5.0",
+        "symfony/var-dumper": "^5.0",
+        "vlucas/phpdotenv": "^4.1",
         "mockery/mockery": "^1.3",
         "phpunit/phpunit": "^8.0|^9.0"
     },