add symfony 7 support

Author: mjauvin

composer.json

@@ -32,7 +32,7 @@
         "psr/http-client-implementation": "*",
         "psr/http-factory": "^1.0",
         "psr/http-message": "^1.0",
-        "symfony/process": "^4.3.4 || ^5.0 || ^6.0"
+        "symfony/process": "^4.3.4 || ^5.0 || ^6.0 || ^7.0"
     },
     "require-dev": {
         "nyholm/psr7": "^1.8",