diff --git a/backend/composer.lock b/backend/composer.lock
index 74f1719..c22d9ee 100644
--- a/backend/composer.lock
+++ b/backend/composer.lock
@@ -306,6 +306,7 @@
                 "Context",
                 "Symfony2"
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         },
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@@ -1540,6 +1541,7 @@
                 "reflection",
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+            "abandoned": "roave/better-reflection",
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@@ -1604,6 +1606,84 @@
             ],
             "time": "2020-01-15T17:16:57+00:00"
         },
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+                "url": "https://github.com/FriendsOfPHP/proxy-manager-lts.git",
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+                    "url": "https://github.com/Ocramius/ProxyManager"
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+                }
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
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+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.io/"
+                },
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+                    "email": "p@tchwork.com"
+                }
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+            "description": "Adding support for a wider range of PHP versions to ocramius/proxy-manager",
+            "homepage": "https://github.com/FriendsOfPHP/proxy-manager-lts",
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+                "lazy loading",
+                "proxy",
+                "proxy pattern",
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+                    "type": "tidelift"
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@@ -3187,91 +3267,6 @@
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@@ -3353,7 +3343,7 @@
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+                    "homepage": "https://www.php-fig.org/"
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@@ -3365,7 +3355,7 @@
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@@ -3415,16 +3405,16 @@
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@@ -3448,7 +3438,7 @@
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@@ -3458,7 +3448,7 @@
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@@ -4006,6 +3996,70 @@
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+            "description": "A generic function and convention to trigger deprecation notices",
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@@ -4313,7 +4364,7 @@
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@@ -4329,25 +4380,27 @@
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@@ -4360,6 +4413,7 @@
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@@ -4397,7 +4446,7 @@
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@@ -4471,7 +4524,21 @@
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@@ -4892,41 +4959,39 @@
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@@ -4934,16 +4999,24 @@
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+                "php": ">=7.2.5",
+                "symfony/polyfill-mbstring": "~1.0",
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@@ -6958,7 +7233,7 @@
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                 "symfony/console": "^4.4|^5.0",
                 "symfony/process": "^4.4|^5.0",
-                "twig/twig": "^2.4|^3.0"
+                "twig/twig": "^2.13|^3.0.4"
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@@ -6969,11 +7244,6 @@
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@@ -6999,7 +7269,7 @@
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony mechanism for exploring and dumping PHP variables",
+            "description": "Provides mechanisms for walking through any arbitrary PHP variable",
             "homepage": "https://symfony.com",
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                 "debug",
@@ -7019,7 +7289,7 @@
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-            "time": "2020-03-27T16:56:45+00:00"
+            "time": "2021-05-07T13:42:21+00:00"
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@@ -7229,60 +7499,6 @@
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-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-2-Clause"
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-            "description": "Tool to write files safely, to avoid race conditions",
-            "keywords": [
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-                "file writer",
-                "race condition",
-                "safe writer",
-                "webimpress"
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-                    "type": "github"
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         }
     ],
     "packages-dev": [
@@ -7748,6 +7964,7 @@
                 "faker",
                 "fixtures"
             ],
+            "abandoned": true,
             "time": "2019-12-12T13:22:17+00:00"
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@@ -8859,6 +9076,7 @@
             "keywords": [
                 "tokenizer"
             ],
+            "abandoned": true,
             "time": "2020-02-07T06:19:00+00:00"
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@@ -10321,17 +10539,71 @@
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
             "time": "2019-06-13T22:48:21+00:00"
         },
+        {
+            "name": "webimpress/safe-writer",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webimpress/safe-writer.git",
+                "reference": "d6e879960febb307c112538997316371f1e95b12"
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+            "dist": {
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+                "reference": "d6e879960febb307c112538997316371f1e95b12",
+                "shasum": ""
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+            "require": {
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+            "require-dev": {
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+                "webimpress/coding-standard": "^1.1.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev",
+                    "dev-develop": "2.1.x-dev",
+                    "dev-release-1.0": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webimpress\\SafeWriter\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-2-Clause"
+            ],
+            "description": "Tool to write files safely, to avoid race conditions",
+            "keywords": [
+                "concurrent write",
+                "file writer",
+                "race condition",
+                "safe writer",
+                "webimpress"
+            ],
+            "funding": [
+                {
+                    "url": "https://github.com/michalbundyra",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-03-21T15:49:08+00:00"
+        },
         {
             "name": "webmozart/assert",
             "version": "1.8.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/webmozart/assert.git",
+                "url": "https://github.com/webmozarts/assert.git",
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