chore(deps): update dependency phpunit/phpunit to v9.6.4

Author: renovate[bot]

composer.json

@@ -10,7 +10,7 @@
   "require-dev": {
     "nunomaduro/phpinsights": "2.6.1",
     "pestphp/pest": "1.22.3",
-    "phpunit/phpunit": "9.5.26",
+    "phpunit/phpunit": "9.6.4",
     "orchestra/testbench": "^7.1",
     "nunomaduro/collision": "6.3.2"
   },