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index b69d389..0ad1d63 100644
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+                "php": ">=7.0",
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@@ -1113,6 +933,10 @@
                 "BSD-3-Clause"
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+                {
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+                    "email": "sebastian@phpunit.de"
+                },
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@@ -1121,17 +945,13 @@
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-                    "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de"
-                },
                 {
                     "name": "Adam Harvey",
                     "email": "aharvey@php.net"
+                },
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
                 }
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@@ -1140,27 +960,40 @@
                 "export",
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-            "time": "2017-04-03T13:19:02+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/exporter/issues",
+                "source": "https://github.com/sebastianbergmann/exporter/tree/3.1.4"
+            },
+            "funding": [
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+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
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+            "time": "2021-11-11T13:51:24+00:00"
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-            "version": "2.0.0",
+            "version": "3.0.2",
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                 "url": "https://github.com/sebastianbergmann/global-state.git",
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+                "php": ">=7.2",
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+                "sebastian/recursion-context": "^3.0"
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             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "ext-dom": "*",
+                "phpunit/phpunit": "^8.0"
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@@ -1168,7 +1001,7 @@
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+                    "dev-master": "3.0-dev"
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@@ -1191,24 +1024,34 @@
             "keywords": [
                 "global state"
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-            "time": "2017-04-27T15:39:26+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/global-state/issues",
+                "source": "https://github.com/sebastianbergmann/global-state/tree/3.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-02-10T06:55:38+00:00"
         },
         {
             "name": "sebastian/object-enumerator",
-            "version": "3.0.3",
+            "version": "3.0.4",
             "source": {
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                 "url": "https://github.com/sebastianbergmann/object-enumerator.git",
-                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
+                "reference": "e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2"
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-                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
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+                "php": ">=7.0",
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@@ -1238,24 +1081,34 @@
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             "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
-            "time": "2017-08-03T12:35:26+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/3.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:40:27+00:00"
         },
         {
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-            "version": "1.1.1",
+            "version": "1.1.2",
             "source": {
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                 "url": "https://github.com/sebastianbergmann/object-reflector.git",
-                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+                "reference": "9b8772b9cbd456ab45d4a598d2dd1a1bced6363d"
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+                "php": ">=7.0"
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@@ -1283,24 +1136,34 @@
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             "homepage": "https://github.com/sebastianbergmann/object-reflector/",
-            "time": "2017-03-29T09:07:27+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/1.1.2"
+            },
+            "funding": [
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+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:37:18+00:00"
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-            "version": "3.0.0",
+            "version": "3.0.1",
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                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
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-                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
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+                "reference": "367dcba38d6e1977be014dc4b22f47a484dac7fb",
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+                "php": ">=7.0"
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@@ -1321,14 +1184,14 @@
                 "BSD-3-Clause"
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-                {
-                    "name": "Jeff Welch",
-                    "email": "whatthejeff@gmail.com"
-                },
                 {
                     "name": "Sebastian Bergmann",
                     "email": "sebastian@phpunit.de"
                 },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
                 {
                     "name": "Adam Harvey",
                     "email": "aharvey@php.net"
@@ -1336,29 +1199,39 @@
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             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2017-03-03T06:23:57+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/3.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:34:24+00:00"
         },
         {
             "name": "sebastian/resource-operations",
-            "version": "1.0.0",
+            "version": "2.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52"
+                "reference": "31d35ca87926450c44eae7e2611d45a7a65ea8b3"
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-                "reference": "ce990bb21759f94aeafd30209e8cfcdfa8bc3f52",
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                 "shasum": ""
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             "require": {
-                "php": ">=5.6.0"
+                "php": ">=7.1"
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             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "2.0-dev"
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             "autoload": {
@@ -1378,29 +1251,42 @@
             ],
             "description": "Provides a list of PHP built-in functions that operate on resources",
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
-            "time": "2015-07-28T20:34:47+00:00"
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/resource-operations/issues",
+                "source": "https://github.com/sebastianbergmann/resource-operations/tree/2.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:30:19+00:00"
         },
         {
-            "name": "sebastian/version",
-            "version": "2.0.1",
+            "name": "sebastian/type",
+            "version": "1.1.4",
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-                "url": "https://github.com/sebastianbergmann/version.git",
-                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "0150cfbc4495ed2df3872fb31b26781e4e077eb4"
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-                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/0150cfbc4495ed2df3872fb31b26781e4e077eb4",
+                "reference": "0150cfbc4495ed2df3872fb31b26781e4e077eb4",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.6"
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "1.1-dev"
                 }
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@@ -1419,87 +1305,86 @@
                     "role": "lead"
                 }
             ],
-            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
-            "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2016-10-03T07:35:21+00:00"
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "source": "https://github.com/sebastianbergmann/type/tree/1.1.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:25:11+00:00"
         },
         {
-            "name": "symfony/polyfill-ctype",
-            "version": "v1.11.0",
+            "name": "sebastian/version",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "82ebae02209c21113908c229e9883c419720738a"
+                "url": "https://github.com/sebastianbergmann/version.git",
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-                "reference": "82ebae02209c21113908c229e9883c419720738a",
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+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
-            },
-            "suggest": {
-                "ext-ctype": "For best performance"
+                "php": ">=5.6"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.11-dev"
+                    "dev-master": "2.0.x-dev"
                 }
             },
             "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Ctype\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
+                "classmap": [
+                    "src/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "MIT"
+                "BSD-3-Clause"
             ],
             "authors": [
                 {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                },
-                {
-                    "name": "Gert de Pagter",
-                    "email": "BackEndTea@gmail.com"
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
                 }
             ],
-            "description": "Symfony polyfill for ctype functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "ctype",
-                "polyfill",
-                "portable"
-            ],
-            "time": "2019-02-06T07:57:58+00:00"
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "source": "https://github.com/sebastianbergmann/version/tree/master"
+            },
+            "time": "2016-10-03T07:35:21+00:00"
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.1.2",
+            "version": "1.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "1c42705be2b6c1de5904f8afacef5895cab44bf8"
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e"
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-                "reference": "1c42705be2b6c1de5904f8afacef5895cab44bf8",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/34a41e998c2183e22995f158c581e7b5e755ab9e",
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e",
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             },
             "require": {
                 "ext-dom": "*",
                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
-                "php": "^7.0"
+                "php": "^7.2 || ^8.0"
             },
             "type": "library",
             "autoload": {
@@ -1519,58 +1404,17 @@
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2019-04-04T09:56:43+00:00"
-        },
-        {
-            "name": "webmozart/assert",
-            "version": "1.4.0",
-            "source": {
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-                "url": "https://github.com/webmozart/assert.git",
-                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9"
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.2.1"
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-                "symfony/polyfill-ctype": "^1.8"
-            },
-            "require-dev": {
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-                "sebastian/version": "^1.0.1"
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-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Webmozart\\Assert\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
+            "funding": [
                 {
-                    "name": "Bernhard Schussek",
-                    "email": "bschussek@gmail.com"
+                    "url": "https://github.com/theseer",
+                    "type": "github"
                 }
             ],
-            "description": "Assertions to validate method input/output with nice error messages.",
-            "keywords": [
-                "assert",
-                "check",
-                "validate"
-            ],
-            "time": "2018-12-25T11:19:39+00:00"
+            "time": "2021-07-28T10:34:58+00:00"
         }
     ],
     "aliases": [],
@@ -1579,7 +1423,8 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=7.0"
+        "php": ">=5.4"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index 18b1f17..842519e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,7 @@
 version: '2'
 services:
     test:
-        image: silintl/php7:latest
+        image: silintl/php8:8.1
         volumes:
             - ./:/data
         working_dir: /data