feat: add support for symfony 7 (#18)

Co-authored-by: Christopher Georg <[email protected]>

Author: Chris53897

composer.json

@@ -13,15 +13,15 @@
     "require": {
         "php": ">=8.0",
         "psr/log": "^1.0|^2.0|^3.0",
-        "symfony/filesystem": "^5.4|^6.0"
+        "symfony/filesystem": "^5.4|^6.0|^7.0"
     },
     "require-dev": {
-        "symfony/process": "^5.4|^6.0",
-        "symfony/console": "^5.4|^6.0",
-        "symfony/finder": "^5.4|^6.0",
+        "symfony/process": "^5.4|^6.0|^7.0",
+        "symfony/console": "^5.4|^6.0|^7.0",
+        "symfony/finder": "^5.4|^6.0|^7.0",
         "league/flysystem": "^1.1.9",
-        "phpunit/phpunit": "^9.5",
-        "symfony/phpunit-bridge": "^6.1"
+        "phpunit/phpunit": "^9.6",
+        "symfony/phpunit-bridge": "^6.4|^7.0"
     },
     "autoload": {
         "psr-4": { "Zenstruck\\Backup\\": "src/" }