diff --git a/composer.json b/composer.json
index b2c8d6a..a4e98e8 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
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+        "phpunit/phpunit": ">=8.5.9",
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diff --git a/composer.lock b/composer.lock
index b2a95cd..4e6af05 100644
--- a/composer.lock
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@@ -4,7 +4,7 @@
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+    "content-hash": "c5a7751b4c60496d92c68d0430a02f18",
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@@ -817,36 +817,31 @@
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+            "version": "1.4.0",
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                 "url": "https://github.com/doctrine/instantiator.git",
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+                "doctrine/coding-standard": "^8.0",
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-                "phpstan/phpstan-phpunit": "^0.11",
-                "phpstan/phpstan-shim": "^0.11",
-                "phpunit/phpunit": "^7.0"
+                "phpbench/phpbench": "^0.13 || 1.0.0-alpha2",
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+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0"
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-            "extra": {
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@@ -860,7 +855,7 @@
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                     "email": "ocramius@gmail.com",
-                    "homepage": "http://ocramius.github.com/"
+                    "homepage": "https://ocramius.github.io/"
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@@ -883,7 +878,7 @@
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-            "time": "2020-05-29T17:27:14+00:00"
+            "time": "2020-11-10T18:47:58+00:00"
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@@ -1106,20 +1101,20 @@
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-            "version": "1.9.5",
+            "version": "1.10.1",
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                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "b2c28789e80a97badd14145fda39b545d83ca3ef"
+                "reference": "969b211f9a51aa1f6c01d1d2aef56d3bd91598e5"
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-                "reference": "b2c28789e80a97badd14145fda39b545d83ca3ef",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/969b211f9a51aa1f6c01d1d2aef56d3bd91598e5",
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-                "php": "^7.1"
+                "php": "^7.1 || ^8.0"
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                 "myclabs/deep-copy": "self.version"
@@ -1150,7 +1145,13 @@
                 "object",
                 "object graph"
             ],
-            "time": "2020-01-17T21:11:47+00:00"
+            "funding": [
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-06-29T13:22:24+00:00"
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         {
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@@ -1763,43 +1764,44 @@
             "keywords": [
                 "tokenizer"
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+            "abandoned": true,
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         {
             "name": "phpunit/phpunit",
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+            "version": "8.5.9",
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                 "url": "https://github.com/sebastianbergmann/phpunit.git",
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+                "reference": "f5c8a5dd5e7e8d68d7562bfb48d47287d33937d6"
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-                "reference": "34c18baa6a44f1d1fbf0338907139e9dce95b997",
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-                "myclabs/deep-copy": "^1.9.1",
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                 "php": "^7.2",
-                "phpspec/prophecy": "^1.8.1",
-                "phpunit/php-code-coverage": "^7.0.7",
+                "phpspec/prophecy": "^1.10.3",
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                 "sebastian/diff": "^3.0.2",
-                "sebastian/environment": "^4.2.2",
-                "sebastian/exporter": "^3.1.1",
+                "sebastian/environment": "^4.2.3",
+                "sebastian/exporter": "^3.1.2",
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@@ -1856,7 +1858,7 @@
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-            "time": "2020-06-22T07:06:58+00:00"
+            "time": "2020-11-10T12:51:38+00:00"
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@@ -3665,23 +3667,23 @@
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-            "version": "1.1.3",
+            "version": "1.2.0",
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-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
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-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
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                 "ext-tokenizer": "*",
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-                "php": "^7.0"
+                "php": "^7.2 || ^8.0"
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@@ -3701,7 +3703,13 @@
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             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2019-06-13T22:48:21+00:00"
+            "funding": [
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+                    "type": "github"
+                }
+            ],
+            "time": "2020-07-12T23:59:07+00:00"
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