[6.4] Allow 7.0 deps

Author: nicolas-grekas

composer.json

@@ -37,10 +37,10 @@
         "nyholm/psr7": "^1.0",
         "php-http/httplug": "^1.0|^2.0",
         "psr/http-client": "^1.0",
-        "symfony/dependency-injection": "^5.4|^6.0",
-        "symfony/http-kernel": "^5.4|^6.0",
-        "symfony/process": "^5.4|^6.0",
-        "symfony/stopwatch": "^5.4|^6.0"
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0",
+        "symfony/process": "^5.4|^6.0|^7.0",
+        "symfony/stopwatch": "^5.4|^6.0|^7.0"
     },
     "conflict": {
         "php-http/discovery": "<1.15",