Add support for Symfony 8 (#402)

Author: villfa

composer.json

@@ -26,17 +26,17 @@
         "ext-json": "*",
         "ext-tokenizer": "*",
         "composer-runtime-api": "^2",
-        "symfony/console": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
-        "symfony/filesystem": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
-        "symfony/process": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
-        "symfony/yaml": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
+        "symfony/console": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/filesystem": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/process": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/yaml": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0",
         "webmozart/assert": "^1.2"
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.5",
         "mockery/mockery": "^1.3.0",
         "phar-io/manifest": "^1.0 || ^2.0",
-        "symfony/phpunit-bridge": "^5.1 || ^6.0 || ^7.0"
+        "symfony/phpunit-bridge": "^5.1 || ^6.0 || ^7.0 || ^8.0"
     },
     "autoload": {
         "psr-4": {