Merge pull request #81 from alexpott/symfony-string-6

Allow symfony/string v6

Author: Chi-teck

composer.json

@@ -33,7 +33,7 @@
         "symfony/console": "^4.4.15 || ^5.1",
         "symfony/filesystem": "^4.4 || ^5.1",
         "symfony/polyfill-php80": "^1.23",
-        "symfony/string": "^5.1",
+        "symfony/string": "^5.1 || ^6",
         "twig/twig": "^2.12 || ^3.1"
     },
     "require-dev": {