Update php requirement to >=8.1 and upgrade twig/twig to ^3.11.2

Author: Jonathan Visser

composer.json

@@ -8,6 +8,7 @@
         "bin/hypernode-deploy"
     ],
     "require": {
+        "php": ">=8.1",
         "ext-json": "*",
         "ext-pcntl": "*",
         "ext-zlib": "*",
@@ -23,7 +24,7 @@
         "symfony/finder": "^5.4",
         "symfony/http-client": "^5.4",
         "symfony/process": "^5.4",
-        "twig/twig": "^2.12",
+        "twig/twig": "^3.11.2",
         "webmozart/assert": "^1.11"
     },
     "autoload": {