dependency update

Author: LaravelFreelancerNL

composer.json

@@ -25,8 +25,8 @@
     "nikic/php-parser": "^4.2@dev",
     "phpmd/phpmd": "dev-master",
     "phpstan/phpstan": "^0.12.0@dev",
-    "phpunit/phpunit": "8.*",
-    "sebastian/phpcpd": "^4.1",
+    "phpunit/phpunit": "9.*",
+    "sebastian/phpcpd": "^5.0",
     "squizlabs/php_codesniffer": "^3.0",
     "triagens/arangodb": "^3.5"
   },