MNT Update development dependencies

Author: GuySartorelli

composer.json

@@ -6,17 +6,17 @@
     "license": "BSD-3-Clause",
     "require": {
         "php": "^8.3",
-        "silverstripe/recipe-plugin": "2.x-dev",
-        "silverstripe/recipe-core": "6.x-dev",
-        "silverstripe/admin": "3.x-dev",
-        "silverstripe/asset-admin": "3.x-dev",
-        "silverstripe/versioned-admin": "3.x-dev",
-        "silverstripe/cms": "6.x-dev",
-        "silverstripe/errorpage": "3.x-dev",
-        "silverstripe/reports": "6.x-dev",
-        "silverstripe/siteconfig": "6.x-dev",
-        "silverstripe/versioned": "3.x-dev",
-        "silverstripe/session-manager": "3.x-dev"
+        "silverstripe/recipe-plugin": "2.0.x-dev",
+        "silverstripe/recipe-core": "6.0.x-dev",
+        "silverstripe/admin": "3.0.x-dev",
+        "silverstripe/asset-admin": "3.0.x-dev",
+        "silverstripe/versioned-admin": "3.0.x-dev",
+        "silverstripe/cms": "6.0.x-dev",
+        "silverstripe/errorpage": "3.0.x-dev",
+        "silverstripe/reports": "6.0.x-dev",
+        "silverstripe/siteconfig": "6.0.x-dev",
+        "silverstripe/versioned": "3.0.x-dev",
+        "silverstripe/session-manager": "3.0.x-dev"
     },
     "require-dev": {
         "phpunit/phpunit": "^11.3",
@@ -33,4 +33,4 @@
     },
     "prefer-stable": true,
     "minimum-stability": "dev"
-}
+}