bump support to PHP>=8.3

Author: timdev

composer.json

@@ -17,13 +17,13 @@
         }
     ],
     "require": {
-        "php": "^8.1",
+        "php": "^8.3",
         "psr/log": "^3.0"
     },
     "require-dev": {
         "ergebnis/composer-normalize": "^2.15",
         "monolog/monolog": "^3.0",
-        "phpunit/phpunit": "^10.0 || ^11.0 || ^12.0",
+        "phpunit/phpunit": "^12.0",
         "symfony/console": "^7",
         "fig/log-test": "^1.1",
         "phpstan/phpstan": "^2.1",