Add support for Symfony 8 (#351)

Author: stof

composer.json

@@ -15,13 +15,13 @@
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-simplexml": "*",
-        "symfony/console": "^4.4 || ^5.3 || ^6.0 || ^7.0",
-        "symfony/filesystem": "^4.4 || ^5.3 || ^6.0 || ^7.0",
-        "symfony/finder": "^4.4 || ^5.3 || ^6.0 || ^7.0"
+        "symfony/console": "^4.4 || ^5.3 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/filesystem": "^4.4 || ^5.3 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/finder": "^4.4 || ^5.3 || ^6.0 || ^7.0 || ^8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6.19",
-        "symfony/phpunit-bridge": "^7.2.0"
+        "symfony/phpunit-bridge": "^7.2.0 || ^8.0"
     },
     "autoload": {
         "psr-4": {