[6.4] Allow 7.0 deps

Author: nicolas-grekas

composer.json

@@ -20,13 +20,13 @@
         "symfony/event-dispatcher-contracts": "^2.5|^3"
     },
     "require-dev": {
-        "symfony/dependency-injection": "^5.4|^6.0",
-        "symfony/expression-language": "^5.4|^6.0",
-        "symfony/config": "^5.4|^6.0",
-        "symfony/error-handler": "^5.4|^6.0",
-        "symfony/http-foundation": "^5.4|^6.0",
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
+        "symfony/expression-language": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0",
+        "symfony/error-handler": "^5.4|^6.0|^7.0",
+        "symfony/http-foundation": "^5.4|^6.0|^7.0",
         "symfony/service-contracts": "^2.5|^3",
-        "symfony/stopwatch": "^5.4|^6.0",
+        "symfony/stopwatch": "^5.4|^6.0|^7.0",
         "psr/log": "^1|^2|^3"
     },
     "conflict": {