Upgrade testing dependencies

Author: SerafimArts

composer.json

@@ -21,7 +21,7 @@
         "php": "^8.1",
         "ffi/env": "^0.1|^1.0",
         "ffi/location": "^0.1|^1.0",
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^9.5.16"
     },
     "autoload": {
         "psr-4": {