add sf6 comlpatibility

composer.json

@@ -9,25 +9,25 @@
     "require": {
         "php": "^8.0",
         "laminas/laminas-escaper": "^2.11",
-        "symfony/property-access": "^7.0",
+        "symfony/property-access": "^6.0 || ^7.0",
         "phpoffice/phpword": "^0.18",
         "tecnickcom/tcpdf": "^6.3",
         "vich/uploader-bundle": "^1.19 || ^2.0",
-        "symfony/yaml": "^7.0",
+        "symfony/yaml": "^6.0 || ^7.0",
         "laminas/laminas-stdlib": "^3.15",
-        "symfony/http-foundation": "^7.0",
+        "symfony/http-foundation": "^6.0 || ^7.0",
         "symfony/http-client-contracts": "^v3.4.0",
         "doctrine/orm": "^2.6 || ^3.0",
-        "symfony/routing": "^7.0",
-        "symfony/framework-bundle": "^7.0",
+        "symfony/routing": "^6.0 || ^7.0",
+        "symfony/framework-bundle": "^6.0 || ^7.0",
         "doctrine/annotations": "^1.13",
-        "symfony/serializer": "^7.0",
+        "symfony/serializer": "^6.0 || ^7.0",
         "twig/twig": "^3.4.3",
         "setasign/fpdi": "^2.3.6",
-        "symfony/process": "^7.0",
+        "symfony/process": "^6.0 || ^7.0",
         "setasign/fpdf": "1.8.4",
         "alexanderpavlov/pdfmerger": "^1.0",
-        "symfony/dotenv": "^7.0"
+        "symfony/dotenv": "^6.0 || ^7.0"
     },
     "autoload": {
         "psr-4": {