Add psr/simple-cache

Author: tatevikg1

composer.json

@@ -78,8 +78,7 @@
         "webklex/php-imap": "^6.2",
         "ext-imap": "*",
         "tatevikgr/rss-feed": "dev-main",
-        "ext-pdo": "*",
-        "ext-gd": "*"
+        "ext-pdo": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",
@@ -96,7 +95,8 @@
         "symfony/http-kernel": "^6.4",
         "symfony/http-foundation": "^6.4",
         "symfony/routing": "^6.4",
-        "symfony/console": "^6.4"
+        "symfony/console": "^6.4",
+        "psr/simple-cache": "^1.0 || ^2.0 || ^3.0"
     },
     "suggest": {
         "phplist/web-frontend": "5.0.x-dev",