Merge pull request #39 from 1ed/symfony-6

Allow Symfony 6

Author: benji07

composer.json

@@ -17,9 +17,9 @@
     ],
     "require": {
         "php": ">=7.1.0",
-        "symfony/framework-bundle": "~2.8|~3.0|~4.0|~5.0",
-        "symfony/form": "~2.8|~3.0|~4.0|~5.0",
-        "symfony/property-access": "~2.8|~3.0|~4.0|~5.0"
+        "symfony/framework-bundle": "~2.8|~3.0|~4.0|~5.0|~6.0",
+        "symfony/form": "~2.8|~3.0|~4.0|~5.0|~6.0",
+        "symfony/property-access": "~2.8|~3.0|~4.0|~5.0|~6.0"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^5.0",