add polyfill for php 8.1, fixes #2368

Closes #2368

Merge request studip/studip!1552

composer.json

@@ -60,7 +60,8 @@
         "monolog/monolog": "^2.8",
         "symfony/polyfill-php73": "^1.27",
         "symfony/polyfill-php74": "^1.27",
-        "symfony/polyfill-php80": "^1.27"
+        "symfony/polyfill-php80": "^1.27",
+        "symfony/polyfill-php81": "^1.27"
     },
     "replace": {
         "symfony/polyfill-php54": "*",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d7bdc2026cea11fc2acf08810dd3519e",
+    "content-hash": "4b87251e3dbe4f1e9674d2cab3ebfe02",
     "packages": [
         {
             "name": "algo26-matthias/idna-convert",
@@ -3571,6 +3571,85 @@
             ],
             "time": "2022-11-03T14:55:06+00:00"
         },
+        {
+            "name": "symfony/polyfill-php81",
+            "version": "v1.27.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php81.git",
+                "reference": "707403074c8ea6e2edaf8794b0157a0bfa52157a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php81/zipball/707403074c8ea6e2edaf8794b0157a0bfa52157a",
+                "reference": "707403074c8ea6e2edaf8794b0157a0bfa52157a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.27-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php81\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.1+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php81/tree/v1.27.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-11-03T14:55:06+00:00"
+        },
         {
             "name": "symfony/process",
             "version": "v5.4.11",