Fix Twig security issue (#328)

Fix Twig security issue (CVE-2024-45411) by upgrading twig/twig dependency.

Co-authored-by: Davide Franco <[email protected]>

Author: dfranco

composer.json

@@ -28,7 +28,7 @@
         "psr/http-message": "^1.1 || ^2.0",
         "slim/slim": "^4.12",
         "symfony/polyfill-php81": "^1.29",
-        "twig/twig": "^3.8"
+        "twig/twig": "^3.11"
     },
     "require-dev": {
         "phpspec/prophecy-phpunit": "^2.0",