Update phpunit version

Author: tatevikg1

composer.json

@@ -52,7 +52,7 @@
         "tatevikgr/rss-feed": "dev-main as 0.1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5.2",
+        "phpunit/phpunit": "^9.6.33",
         "guzzlehttp/guzzle": "^7.2.0",
         "squizlabs/php_codesniffer": "^3.5.8",
         "phpstan/phpstan": "^1.10",
@@ -61,7 +61,8 @@
         "phpmd/phpmd": "^2.6.0",
         "roave/security-advisories": "dev-master",
         "symfony/process": "^6.4",
-        "symfony/framework-bundle": "^6.4"
+        "symfony/framework-bundle": "^6.4",
+        "phpdocumentor/reflection-docblock": "^5.2"
     },
     "autoload": {
         "psr-4": {