Updated phpunit versión

Author: dacoto

composer.json

@@ -7,7 +7,7 @@
         "illuminate/validation": "^6.0|^7.0|^8.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5"
+        "phpunit/phpunit": "^9.3"
     },
     "autoload": {
         "psr-4": {