Add conflict for symfony/framework-bundle versions that break enum serializing

Author: GwendolenLynch

composer.json

@@ -107,6 +107,7 @@
         "doctrine/orm": "<2.14.0",
         "doctrine/mongodb-odm": "<2.4",
         "doctrine/persistence": "<1.3",
+        "symfony/framework-bundle": "6.4.6 || 7.0.6",
         "symfony/var-exporter": "<6.1.1",
         "phpunit/phpunit": "<9.5",
         "phpspec/prophecy": "<1.15",
@@ -149,7 +150,8 @@
         "allow-plugins": {
             "composer/package-versions-deprecated": true,
             "phpstan/extension-installer": true,
-            "php-http/discovery": true
+            "php-http/discovery": true,
+            "soyuka/pmu": true
         }
     },
     "extra": {