chore(deps): update phpunit packages

Author: renovate[bot]

composer.json

@@ -3,8 +3,8 @@
   "description": "A WordPress tool suite for building data-driven interfaces with a clean extensible architecture.",
   "repositories": [],
   "require-dev": {
-    "phpunit/phpunit": "^9.6.31",
-    "yoast/phpunit-polyfills": "^2.0.5"
+    "phpunit/phpunit": "^12.5.4",
+    "yoast/phpunit-polyfills": "^4.0.0"
   },
   "require": {},
   "autoload": {