chore: clean dependencies (#263)

Remove
* ext-json (included in php 8.3)
* composer/package-versions-deprecated  (deprecated + unused?)
* incenteev/composer-parameter-handler  (unused?)
* twig/extra-bundle (unused)

Update
* symfony/flex -> version 2

Replace
* symfony/polyfill-php72
* symfony/polyfill-php80
* symfony/polyfill-php83

Author: smnandre

composer.json

@@ -5,19 +5,16 @@
     "license": "MIT",
     "require": {
         "php": ">=8.3",
-        "ext-json": "*",
-        "composer/package-versions-deprecated": "^1.11",
         "doctrine/common": "^3.0",
         "doctrine/dbal": "^2.13",
         "doctrine/doctrine-bundle": "^2.4",
         "doctrine/doctrine-migrations-bundle": "^3.0",
         "doctrine/orm": "^2.7",
-        "incenteev/composer-parameter-handler": "~2.0",
         "knplabs/github-api": "^3.3",
         "nyholm/psr7": "^1.3",
         "symfony/console": "^6.4",
         "symfony/dotenv": "^6.4",
-        "symfony/flex": "^1.18.6",
+        "symfony/flex": "^2.0",
         "symfony/framework-bundle": "^6.4",
         "symfony/http-client": "^6.4",
         "symfony/lock": "^6.4",
@@ -27,12 +24,16 @@
         "symfony/translation-contracts": "*",
         "symfony/twig-bundle": "^6.4",
         "symfony/yaml": "^6.4",
-        "twig/extra-bundle": "^3.3",
         "twig/twig": "^3.3.8"
     },
     "conflict": {
         "symfony/symfony": "*"
     },
+    "replace": {
+        "symfony/polyfill-php72": "*",
+        "symfony/polyfill-php80": "*",
+        "symfony/polyfill-php83": "*"
+    },
     "require-dev": {
         "happyr/service-mocking": "^0.3",
         "symfony/browser-kit": "^6.4",