Allow symfony/mime 7.0

Author: pierredup

composer.json

@@ -26,7 +26,7 @@
         "psr/http-client": "^1.0",
         "psr/http-client-implementation": "^1.0",
         "psr/http-factory": "^1.0",
-        "symfony/mime": "^4.4 || ^5.0 || ^6.0"
+        "symfony/mime": "^4.4 || ^5.0 || ^6.0 || ^7.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.4",