[TASK] Set minimum TYPO3 version to 12.4.9

In this version the AsController attribute for tagging backend controller has been introduced. This is used since #240, therefore we raise the minimum TYPO3 version.

composer.json

@@ -13,13 +13,13 @@
     ],
     "require": {
         "php": "^8.1",
-        "typo3/cms-backend": "^12.4",
-        "typo3/cms-core": "^12.4",
-        "typo3/cms-extbase": "^12.4",
-        "typo3/cms-fluid": "^12.4",
-        "typo3/cms-fluid-styled-content": "^12.4",
-        "typo3/cms-linkvalidator": "^12.4",
-        "typo3/cms-reactions": "^12.4"
+        "typo3/cms-backend": "^12.4.9",
+        "typo3/cms-core": "^12.4.9",
+        "typo3/cms-extbase": "^12.4.9",
+        "typo3/cms-fluid": "^12.4.9",
+        "typo3/cms-fluid-styled-content": "^12.4.9",
+        "typo3/cms-linkvalidator": "^12.4.9",
+        "typo3/cms-reactions": "^12.4.9"
     },
     "require-dev": {
         "ergebnis/composer-normalize": "~2.39.0",

ext_emconf.php

@@ -27,9 +27,9 @@
     'version' => '12.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '12.4.0-12.4.99',
-            'fluid_styled_content' => '12.4.0-12.4.99',
-            'linkvalidator' => '12.4.0-12.4.99',
+            'typo3' => '12.4.9-12.4.99',
+            'fluid_styled_content' => '12.4.9-12.4.99',
+            'linkvalidator' => '12.4.9-12.4.99',
         ],
         'conflicts' => [],
         'suggests' => [],