Test against Symfony 6+ & PHP 8.3

Author: jmsche

.github/workflows/test.yaml

@@ -33,8 +33,12 @@ jobs:
                 php-version:
                     - '8.1'
                     - '8.2'
+                    - '8.3'
                 symfony-version:
                     - '5.4.*'
+                    - '6.0.*'
+                    - '6.1.*'
+                    - '6.2.*'
                     - '6.3.*'
                 include:
                     - php-version: '8.0'