chore(deps): update phpunit to v9.3.3

Author: xel1045

composer.json

@@ -23,7 +23,7 @@
     "require-dev": {
         "mockery/mockery": "^1.0",
         "orchestra/testbench": "^4.0|^5.0|^6.0",
-        "phpunit/phpunit": "^8.0",
+        "phpunit/phpunit": "^9.3.3",
         "squizlabs/php_codesniffer": "^3.6.0"
     },
     "autoload": {