Update phpunit version (#109)

* Update phpunit version

---------

Co-authored-by: Tatevik <tatevikg1@gmail.com>

Author: TatevikGr

composer.json

@@ -38,8 +38,8 @@
             "url": "https://github.com/tatevikgr/phplist-api-client"
         },
         {
-          "type": "vcs",
-          "url": "https://github.com/tatevikgr/rss-bundle.git"
+            "type": "vcs",
+            "url": "https://github.com/tatevikgr/rss-bundle.git"
         }
     ],
     "require": {
@@ -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": {