diff --git a/backend/composer.lock b/backend/composer.lock
index 63f6747..d39338c 100644
--- a/backend/composer.lock
+++ b/backend/composer.lock
@@ -39,54 +39,6 @@
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@@ -184,20 +136,24 @@
                 "container-interop",
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+                "source": "https://github.com/php-fig/container/tree/master"
+            },
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+            "version": "1.1.4",
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@@ -206,7 +162,7 @@
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@@ -221,7 +177,7 @@
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                     "name": "PHP-FIG",
-                    "homepage": "http://www.php-fig.org/"
+                    "homepage": "https://www.php-fig.org/"
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@@ -231,7 +187,10 @@
                 "psr",
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-            "time": "2016-10-10T12:19:37+00:00"
+            "support": {
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@@ -325,34 +284,29 @@
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+                "php": ">=7.1.3",
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@@ -375,22 +329,40 @@
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-            "description": "Symfony Debug Component",
+            "description": "Provides tools to ease debugging PHP code",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T17:14:19+00:00"
+            "support": {
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+                    "type": "tidelift"
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+            "abandoned": "symfony/error-handler",
+            "time": "2022-07-28T16:29:46+00:00"
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+            "version": "v3.4.47",
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@@ -402,6 +374,7 @@
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@@ -440,7 +408,24 @@
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+            "support": {
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+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
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@@ -493,16 +478,16 @@
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@@ -543,32 +523,51 @@
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@@ -582,7 +581,7 @@
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@@ -631,24 +625,126 @@
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+                    "homepage": "https://symfony.com/contributors"
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+            "homepage": "https://symfony.com",
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@@ -656,16 +752,20 @@
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+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
                 },
-                "files": [
-                    "bootstrap.php"
-                ],
-                "classmap": [
-                    "Resources/stubs"
-                ]
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 5.6+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php56/tree/v1.20.0"
+            },
+            "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": "2020-10-23T14:02:19+00:00"
+        },
+        {
+            "name": "symfony/polyfill-php70",
+            "version": "v1.20.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php70.git",
+                "reference": "5f03a781d984aae42cebd18e7912fa80f02ee644"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php70/zipball/5f03a781d984aae42cebd18e7912fa80f02ee644",
+                "reference": "5f03a781d984aae42cebd18e7912fa80f02ee644",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "type": "metapackage",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.20-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -749,7 +926,24 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-10-11T12:05:26+00:00"
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php70/tree/v1.20.0"
+            },
+            "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": "2020-10-23T14:02:19+00:00"
         },
         {
             "name": "symfony/routing",
@@ -2411,5 +2605,6 @@
     "platform": {
         "php": ">=7.0"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
 }