diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index e5b6e4a6..327b96d3 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - "5.x"
+      - "6.x"
   schedule:
     - cron:  '* 8 * * *'
 
diff --git a/.github/workflows/static-analyze.yml b/.github/workflows/static-analyze.yml
index 8b4a08e8..b04478b3 100644
--- a/.github/workflows/static-analyze.yml
+++ b/.github/workflows/static-analyze.yml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - "5.x"
+      - "6.x"
   schedule:
     - cron:  '* 8 * * *'
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9c645a52..b9e987be 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches:
-      - "5.x"
+      - "6.x"
   schedule:
     - cron:  '* 8 * * *'
 
diff --git a/.phive/phars.xml b/.phive/phars.xml
index a236169d..6172561a 100644
--- a/.phive/phars.xml
+++ b/.phive/phars.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
   <phar name="php-cs-fixer" version="^2.16.4" installed="2.16.4" location="./tools/php-cs-fixer" copy="true"/>
-  <phar name="phpstan" version="^0.12.32" installed="0.12.32" location="./tools/phpstan" copy="true"/>
+  <phar name="phpstan" version="^0.12.32" installed="0.12.52" location="./tools/phpstan" copy="true"/>
   <phar name="roave/backwardcompatibilitycheck" version="^5.0.0" installed="5.0.0" location="./tools/roave-backward-compatibility-check" copy="true"/>
-  <phar name="psalm" version="^3.12.2" installed="3.12.2" location="./tools/psalm" copy="true"/>
-  <phar name="infection" version="^0.16.4" installed="0.16.4" location="./tools/infection" copy="true"/>
+  <phar name="psalm" version="^3.12.2" installed="3.18.2" location="./tools/psalm" copy="true"/>
+  <phar name="infection" version="^0.16.4" installed="0.18.2" location="./tools/infection" copy="true"/>
 </phive>
diff --git a/composer.lock b/composer.lock
index 25e808ba..558aea3e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -59,6 +59,10 @@
                 "to",
                 "to string"
             ],
+            "support": {
+                "issues": "https://github.com/coduo/php-to-string/issues",
+                "source": "https://github.com/coduo/php-to-string/tree/3.1.0"
+            },
             "time": "2020-09-27T10:31:58+00:00"
         },
         {
@@ -121,6 +125,10 @@
                 "parser",
                 "php"
             ],
+            "support": {
+                "issues": "https://github.com/doctrine/lexer/issues",
+                "source": "https://github.com/doctrine/lexer/tree/1.2.1"
+            },
             "funding": [
                 {
                     "url": "https://www.doctrine-project.org/sponsorship.html",
@@ -211,6 +219,9 @@
                 "l10n",
                 "localization"
             ],
+            "support": {
+                "source": "https://github.com/symfony/intl/tree/v5.1.7"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -287,6 +298,9 @@
                 "portable",
                 "shim"
             ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-intl-icu/tree/v1.19.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -367,6 +381,9 @@
                 "portable",
                 "shim"
             ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php80/tree/v1.19.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -439,6 +456,10 @@
                 "constructor",
                 "instantiate"
             ],
+            "support": {
+                "issues": "https://github.com/doctrine/instantiator/issues",
+                "source": "https://github.com/doctrine/instantiator/tree/1.3.x"
+            },
             "funding": [
                 {
                     "url": "https://www.doctrine-project.org/sponsorship.html",
@@ -501,6 +522,10 @@
                 "object",
                 "object graph"
             ],
+            "support": {
+                "issues": "https://github.com/myclabs/DeepCopy/issues",
+                "source": "https://github.com/myclabs/DeepCopy/tree/1.x"
+            },
             "funding": [
                 {
                     "url": "https://tidelift.com/funding/github/packagist/myclabs/deep-copy",
@@ -559,6 +584,10 @@
                 "parser",
                 "php"
             ],
+            "support": {
+                "issues": "https://github.com/nikic/PHP-Parser/issues",
+                "source": "https://github.com/nikic/PHP-Parser/tree/v4.10.2"
+            },
             "time": "2020-09-26T10:30:38+00:00"
         },
         {
@@ -608,6 +637,10 @@
                 "xml",
                 "xml conversion"
             ],
+            "support": {
+                "issues": "https://github.com/nullivex/lib-array2xml/issues",
+                "source": "https://github.com/nullivex/lib-array2xml/tree/master"
+            },
             "time": "2019-03-29T20:06:56+00:00"
         },
         {
@@ -664,6 +697,10 @@
                 }
             ],
             "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"
+            },
             "time": "2020-06-27T14:33:11+00:00"
         },
         {
@@ -711,6 +748,10 @@
                 }
             ],
             "description": "Library for handling version information and constraints",
+            "support": {
+                "issues": "https://github.com/phar-io/version/issues",
+                "source": "https://github.com/phar-io/version/tree/master"
+            },
             "time": "2020-06-27T14:39:04+00:00"
         },
         {
@@ -760,6 +801,10 @@
                 "reflection",
                 "static analysis"
             ],
+            "support": {
+                "issues": "https://github.com/phpDocumentor/ReflectionCommon/issues",
+                "source": "https://github.com/phpDocumentor/ReflectionCommon/tree/2.x"
+            },
             "time": "2020-06-27T09:03:43+00:00"
         },
         {
@@ -812,6 +857,10 @@
                 }
             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
+            "support": {
+                "issues": "https://github.com/phpDocumentor/ReflectionDocBlock/issues",
+                "source": "https://github.com/phpDocumentor/ReflectionDocBlock/tree/master"
+            },
             "time": "2020-09-03T19:13:55+00:00"
         },
         {
@@ -857,6 +906,10 @@
                 }
             ],
             "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
+            "support": {
+                "issues": "https://github.com/phpDocumentor/TypeResolver/issues",
+                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.4.0"
+            },
             "time": "2020-09-17T18:55:26+00:00"
         },
         {
@@ -920,6 +973,10 @@
                 "spy",
                 "stub"
             ],
+            "support": {
+                "issues": "https://github.com/phpspec/prophecy/issues",
+                "source": "https://github.com/phpspec/prophecy/tree/1.12.1"
+            },
             "time": "2020-09-29T09:10:42+00:00"
         },
         {
@@ -987,6 +1044,10 @@
                 "testing",
                 "xunit"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.0"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1043,6 +1104,10 @@
                 "filesystem",
                 "iterator"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
+                "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/3.0.5"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1102,6 +1167,10 @@
             "keywords": [
                 "process"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-invoker/issues",
+                "source": "https://github.com/sebastianbergmann/php-invoker/tree/3.1.1"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1157,6 +1226,10 @@
             "keywords": [
                 "template"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-text-template/issues",
+                "source": "https://github.com/sebastianbergmann/php-text-template/tree/2.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1212,6 +1285,10 @@
             "keywords": [
                 "timer"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/php-timer/issues",
+                "source": "https://github.com/sebastianbergmann/php-timer/tree/5.0.2"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1307,6 +1384,10 @@
                 "testing",
                 "xunit"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/phpunit/issues",
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.4.2"
+            },
             "funding": [
                 {
                     "url": "https://phpunit.de/donate.html",
@@ -1363,6 +1444,9 @@
                 "psr",
                 "psr-6"
             ],
+            "support": {
+                "source": "https://github.com/php-fig/cache/tree/master"
+            },
             "time": "2016-08-06T20:24:11+00:00"
         },
         {
@@ -1412,6 +1496,10 @@
                 "container-interop",
                 "psr"
             ],
+            "support": {
+                "issues": "https://github.com/php-fig/container/issues",
+                "source": "https://github.com/php-fig/container/tree/master"
+            },
             "time": "2017-02-14T16:28:37+00:00"
         },
         {
@@ -1459,6 +1547,9 @@
                 "psr",
                 "psr-3"
             ],
+            "support": {
+                "source": "https://github.com/php-fig/log/tree/1.1.3"
+            },
             "time": "2020-03-23T09:12:05+00:00"
         },
         {
@@ -1505,6 +1596,10 @@
             ],
             "description": "Library for parsing CLI options",
             "homepage": "https://github.com/sebastianbergmann/cli-parser",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/cli-parser/issues",
+                "source": "https://github.com/sebastianbergmann/cli-parser/tree/1.0.1"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1557,6 +1652,10 @@
             ],
             "description": "Collection of value objects that represent the PHP code units",
             "homepage": "https://github.com/sebastianbergmann/code-unit",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/code-unit/issues",
+                "source": "https://github.com/sebastianbergmann/code-unit/tree/1.0.7"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1608,6 +1707,10 @@
             ],
             "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/2.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1678,6 +1781,10 @@
                 "compare",
                 "equality"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/comparator/issues",
+                "source": "https://github.com/sebastianbergmann/comparator/tree/4.0.5"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1731,6 +1838,10 @@
             ],
             "description": "Library for calculating the complexity of PHP code units",
             "homepage": "https://github.com/sebastianbergmann/complexity",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/complexity/issues",
+                "source": "https://github.com/sebastianbergmann/complexity/tree/2.0.1"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1793,6 +1904,10 @@
                 "unidiff",
                 "unified diff"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/diff/issues",
+                "source": "https://github.com/sebastianbergmann/diff/tree/4.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1852,6 +1967,10 @@
                 "environment",
                 "hhvm"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/environment/issues",
+                "source": "https://github.com/sebastianbergmann/environment/tree/5.1.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1925,6 +2044,10 @@
                 "export",
                 "exporter"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/exporter/issues",
+                "source": "https://github.com/sebastianbergmann/exporter/tree/4.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -1985,6 +2108,10 @@
             "keywords": [
                 "global state"
             ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/global-state/issues",
+                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.1"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2038,6 +2165,10 @@
             ],
             "description": "Library for counting the lines of code in PHP source code",
             "homepage": "https://github.com/sebastianbergmann/lines-of-code",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/lines-of-code/issues",
+                "source": "https://github.com/sebastianbergmann/lines-of-code/tree/1.0.1"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2091,6 +2222,10 @@
             ],
             "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/4.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2142,6 +2277,10 @@
             ],
             "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/2.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2201,6 +2340,10 @@
             ],
             "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/4.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2252,6 +2395,10 @@
             ],
             "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/3.0.3"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2304,6 +2451,10 @@
             ],
             "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/2.3.0"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2353,6 +2504,10 @@
             ],
             "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/3.0.2"
+            },
             "funding": [
                 {
                     "url": "https://github.com/sebastianbergmann",
@@ -2439,6 +2594,9 @@
                 "caching",
                 "psr6"
             ],
+            "support": {
+                "source": "https://github.com/symfony/cache/tree/v5.1.7"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2515,6 +2673,9 @@
                 "interoperability",
                 "standards"
             ],
+            "support": {
+                "source": "https://github.com/symfony/cache-contracts/tree/v2.2.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2581,6 +2742,9 @@
             ],
             "description": "Symfony ExpressionLanguage Component",
             "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/expression-language/tree/v5.1.7"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2657,6 +2821,9 @@
                 "polyfill",
                 "portable"
             ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.19.0"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2733,6 +2900,9 @@
                 "interoperability",
                 "standards"
             ],
+            "support": {
+                "source": "https://github.com/symfony/service-contracts/tree/master"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2808,6 +2978,9 @@
                 "instantiate",
                 "serialize"
             ],
+            "support": {
+                "source": "https://github.com/symfony/var-exporter/tree/5.1"
+            },
             "funding": [
                 {
                     "url": "https://symfony.com/sponsor",
@@ -2862,6 +3035,10 @@
                 }
             ],
             "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": [
                 {
                     "url": "https://github.com/theseer",
@@ -2917,6 +3094,10 @@
                 "check",
                 "validate"
             ],
+            "support": {
+                "issues": "https://github.com/webmozart/assert/issues",
+                "source": "https://github.com/webmozart/assert/tree/master"
+            },
             "time": "2020-07-08T17:02:28+00:00"
         }
     ],
@@ -2932,5 +3113,5 @@
         "ext-simplexml": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "1.1.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/infection.json b/infection.json
index 7bed120d..c94aa61c 100644
--- a/infection.json
+++ b/infection.json
@@ -1,5 +1,5 @@
 {
-  "timeout": 5,
+  "timeout": 1000,
   "source": {
     "directories": [
       "src"