fix pull #575

Author: georgio

composer.json

@@ -30,19 +30,19 @@
         ]
     },
     "require": {
-        "php": "^7.2"
+        "php": "^7.2 || 8.0.*"
     },
     "require-dev": {
         "ext-dom": "*",
         "ext-curl": "*",
         "ext-json": "*",
         "symfony/http-foundation": "~2.1",
         "predis/predis": "0.8.*@dev",
-        "phpunit/phpunit": "8.5",
         "squizlabs/php_codesniffer": "^3.5",
-        "friendsofphp/php-cs-fixer": "^2.16",
         "symfony/var-dumper": "^5.1",
-        "symfony/finder": "^5.1"
+        "symfony/finder": "^5.1",
+        "phpunit/phpunit": "9.5.8",
+        "friendsofphp/php-cs-fixer": "^3.0"
     },
     "suggest": {
         "symfony/http-foundation": "Allows using the Symfony Session storage backend.",