diff --git a/composer.json b/composer.json
index afb5ec59..74e6368c 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
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     "phpstan/phpstan-strict-rules": "~0.12.9",
-    "phpunit/phpunit": "^8.5.14",
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diff --git a/composer.lock b/composer.lock
index d0eef10b..c8674d61 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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     ],
-    "content-hash": "cf13b34f0106194230070c2225c3d0f9",
+    "content-hash": "9809a1d705549e8cadd2d744ed4e6330",
     "packages": [
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             "name": "ergebnis/json-printer",
@@ -672,6 +672,10 @@
                 "constructor",
                 "instantiate"
             ],
+            "support": {
+                "issues": "https://github.com/doctrine/instantiator/issues",
+                "source": "https://github.com/doctrine/instantiator/tree/1.4.0"
+            },
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@@ -1582,6 +1586,10 @@
                 "object",
                 "object graph"
             ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.10.2"
+            },
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@@ -1804,20 +1812,24 @@
                 }
             ],
             "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "support": {
+                "issues": "https://github.com/phar-io/manifest/issues",
+                "source": "https://github.com/phar-io/manifest/tree/master"
+            },
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         },
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-            "version": "3.0.4",
+            "version": "3.1.0",
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                 "url": "https://github.com/phar-io/version.git",
-                "reference": "e4782611070e50613683d2b9a57730e9a3ba5451"
+                "reference": "bae7c545bef187884426f042434e561ab1ddb182"
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-                "reference": "e4782611070e50613683d2b9a57730e9a3ba5451",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/bae7c545bef187884426f042434e561ab1ddb182",
+                "reference": "bae7c545bef187884426f042434e561ab1ddb182",
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@@ -1851,7 +1863,11 @@
                 }
             ],
             "description": "Library for handling version information and constraints",
-            "time": "2020-12-13T23:18:30+00:00"
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/3.1.0"
+            },
+            "time": "2021-02-23T14:00:09+00:00"
         },
         {
             "name": "php-cs-fixer/diff",
@@ -2068,16 +2084,16 @@
         },
         {
             "name": "phpspec/prophecy",
-            "version": "1.12.2",
+            "version": "1.13.0",
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                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "245710e971a030f42e08f4912863805570f23d39"
+                "reference": "be1996ed8adc35c3fd795488a653f4b518be70ea"
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-                "reference": "245710e971a030f42e08f4912863805570f23d39",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/be1996ed8adc35c3fd795488a653f4b518be70ea",
+                "reference": "be1996ed8adc35c3fd795488a653f4b518be70ea",
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             "require": {
@@ -2127,7 +2143,11 @@
                 "spy",
                 "stub"
             ],
-            "time": "2020-12-19T10:15:11+00:00"
+            "support": {
+                "issues": "https://github.com/phpspec/prophecy/issues",
+                "source": "https://github.com/phpspec/prophecy/tree/1.13.0"
+            },
+            "time": "2021-03-17T13:42:18+00:00"
         },
         {
             "name": "phpstan/extension-installer",
@@ -2432,6 +2452,10 @@
                 "testing",
                 "xunit"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/7.0.14"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2488,6 +2512,10 @@
                 "filesystem",
                 "iterator"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/2.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2535,6 +2563,10 @@
             "keywords": [
                 "template"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-text-template/issues",
+                "source": "https://github.com/sebastianbergmann/php-text-template/tree/1.2.1"
+            },
             "time": "2015-06-21T13:50:34+00:00"
         },
         {
@@ -2584,6 +2616,10 @@
             "keywords": [
                 "timer"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-timer/issues",
+                "source": "https://github.com/sebastianbergmann/php-timer/tree/2.1.3"
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             "funding": [
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                     "url": "https://github.com/sebastianbergmann",
@@ -2639,6 +2675,10 @@
             "keywords": [
                 "tokenizer"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-token-stream/issues",
+                "source": "https://github.com/sebastianbergmann/php-token-stream/tree/3.1.2"
+            },
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@@ -2650,16 +2690,16 @@
         },
         {
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+            "version": "8.5.15",
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                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "c25f79895d27b6ecd5abfa63de1606b786a461a3"
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-                "reference": "c25f79895d27b6ecd5abfa63de1606b786a461a3",
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             "require": {
@@ -2729,6 +2769,10 @@
                 "testing",
                 "xunit"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/phpunit/issues",
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.15"
+            },
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@@ -2739,7 +2783,7 @@
                     "type": "github"
                 }
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-            "time": "2021-01-17T07:37:30+00:00"
+            "time": "2021-03-17T07:27:54+00:00"
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@@ -3042,6 +3086,10 @@
             ],
             "description": "Looks up which function or method a line of code belongs to",
             "homepage": "https://github.com/sebastianbergmann/code-unit-reverse-lookup/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/code-unit-reverse-lookup/issues",
+                "source": "https://github.com/sebastianbergmann/code-unit-reverse-lookup/tree/1.0.2"
+            },
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@@ -3112,6 +3160,10 @@
                 "compare",
                 "equality"
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+            "support": {
+                "issues": "https://github.com/sebastianbergmann/comparator/issues",
+                "source": "https://github.com/sebastianbergmann/comparator/tree/3.0.3"
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@@ -3237,6 +3289,10 @@
                 "environment",
                 "hhvm"
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+            "support": {
+                "issues": "https://github.com/sebastianbergmann/environment/issues",
+                "source": "https://github.com/sebastianbergmann/environment/tree/4.2.4"
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             "funding": [
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@@ -3310,6 +3366,10 @@
                 "export",
                 "exporter"
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+            "support": {
+                "issues": "https://github.com/sebastianbergmann/exporter/issues",
+                "source": "https://github.com/sebastianbergmann/exporter/tree/3.1.3"
+            },
             "funding": [
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                     "url": "https://github.com/sebastianbergmann",
@@ -3370,6 +3430,10 @@
             "keywords": [
                 "global state"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/global-state/issues",
+                "source": "https://github.com/sebastianbergmann/global-state/tree/3.0.1"
+            },
             "funding": [
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@@ -3423,6 +3487,10 @@
             ],
             "description": "Traverses array structures and object graphs to enumerate all referenced objects",
             "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/3.0.4"
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@@ -3474,6 +3542,10 @@
             ],
             "description": "Allows reflection of object attributes, including inherited and non-public ones",
             "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/1.1.2"
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@@ -3533,6 +3605,10 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/3.0.1"
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@@ -3581,6 +3657,10 @@
             ],
             "description": "Provides a list of PHP built-in functions that operate on resources",
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/resource-operations/issues",
+                "source": "https://github.com/sebastianbergmann/resource-operations/tree/2.0.2"
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@@ -3633,6 +3713,10 @@
             ],
             "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"
+            },
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@@ -3682,6 +3766,10 @@
             ],
             "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"
         },
         {
@@ -5427,6 +5515,10 @@
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/master"
+            },
             "funding": [
                 {
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