diff --git a/composer.json b/composer.json
index 70313ec..93fd86a 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,9 @@
         "infection/infection": "^0.21.5",
         "madewithlove/license-checker": "^0.10.0",
         "phly/keep-a-changelog": "^2.11",
+        "phpstan/extension-installer": "^1.1",
         "phpstan/phpstan": "^0.12.88",
+        "phpstan/phpstan-phpunit": "^0.12.22",
         "phpstan/phpstan-strict-rules": "^0.12.9",
         "phpunit/phpunit": "^9.5.4",
         "roave/security-advisories": "dev-latest",
diff --git a/composer.lock b/composer.lock
index 4c8ad7e..a75e34b 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "fc7a0c4d47681db0cee739c2bc88001e",
+    "content-hash": "38dc4675282fa89769a7933b6aa73a58",
     "packages": [
         {
             "name": "captainhook/captainhook",
@@ -2388,16 +2388,16 @@
         },
         {
             "name": "nikic/php-parser",
-            "version": "v4.10.5",
+            "version": "v4.13.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "4432ba399e47c66624bc73c8c0f811e5c109576f"
+                "reference": "50953a2691a922aa1769461637869a0a2faa3f53"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/4432ba399e47c66624bc73c8c0f811e5c109576f",
-                "reference": "4432ba399e47c66624bc73c8c0f811e5c109576f",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/50953a2691a922aa1769461637869a0a2faa3f53",
+                "reference": "50953a2691a922aa1769461637869a0a2faa3f53",
                 "shasum": ""
             },
             "require": {
@@ -2438,9 +2438,9 @@
             ],
             "support": {
                 "issues": "https://github.com/nikic/PHP-Parser/issues",
-                "source": "https://github.com/nikic/PHP-Parser/tree/v4.10.5"
+                "source": "https://github.com/nikic/PHP-Parser/tree/v4.13.0"
             },
-            "time": "2021-05-03T19:11:20+00:00"
+            "time": "2021-09-20T12:20:58+00:00"
         },
         {
             "name": "ocramius/package-versions",
@@ -2578,16 +2578,16 @@
         },
         {
             "name": "phar-io/manifest",
-            "version": "2.0.1",
+            "version": "2.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phar-io/manifest.git",
-                "reference": "85265efd3af7ba3ca4b2a2c34dbfc5788dd29133"
+                "reference": "97803eca37d319dfa7826cc2437fc020857acb53"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phar-io/manifest/zipball/85265efd3af7ba3ca4b2a2c34dbfc5788dd29133",
-                "reference": "85265efd3af7ba3ca4b2a2c34dbfc5788dd29133",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/97803eca37d319dfa7826cc2437fc020857acb53",
+                "reference": "97803eca37d319dfa7826cc2437fc020857acb53",
                 "shasum": ""
             },
             "require": {
@@ -2632,9 +2632,9 @@
             "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"
+                "source": "https://github.com/phar-io/manifest/tree/2.0.3"
             },
-            "time": "2020-06-27T14:33:11+00:00"
+            "time": "2021-07-20T11:28:43+00:00"
         },
         {
             "name": "phar-io/version",
@@ -3430,16 +3430,16 @@
         },
         {
             "name": "phpdocumentor/type-resolver",
-            "version": "1.4.0",
+            "version": "1.5.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0"
+                "reference": "a12f7e301eb7258bb68acd89d4aefa05c2906cae"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0",
-                "reference": "6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/a12f7e301eb7258bb68acd89d4aefa05c2906cae",
+                "reference": "a12f7e301eb7258bb68acd89d4aefa05c2906cae",
                 "shasum": ""
             },
             "require": {
@@ -3447,7 +3447,8 @@
                 "phpdocumentor/reflection-common": "^2.0"
             },
             "require-dev": {
-                "ext-tokenizer": "*"
+                "ext-tokenizer": "*",
+                "psalm/phar": "^4.8"
             },
             "type": "library",
             "extra": {
@@ -3473,39 +3474,39 @@
             "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"
+                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.5.1"
             },
-            "time": "2020-09-17T18:55:26+00:00"
+            "time": "2021-10-02T14:08:47+00:00"
         },
         {
             "name": "phpspec/prophecy",
-            "version": "1.13.0",
+            "version": "1.14.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "be1996ed8adc35c3fd795488a653f4b518be70ea"
+                "reference": "d86dfc2e2a3cd366cee475e52c6bb3bbc371aa0e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/be1996ed8adc35c3fd795488a653f4b518be70ea",
-                "reference": "be1996ed8adc35c3fd795488a653f4b518be70ea",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/d86dfc2e2a3cd366cee475e52c6bb3bbc371aa0e",
+                "reference": "d86dfc2e2a3cd366cee475e52c6bb3bbc371aa0e",
                 "shasum": ""
             },
             "require": {
                 "doctrine/instantiator": "^1.2",
-                "php": "^7.2 || ~8.0, <8.1",
+                "php": "^7.2 || ~8.0, <8.2",
                 "phpdocumentor/reflection-docblock": "^5.2",
                 "sebastian/comparator": "^3.0 || ^4.0",
                 "sebastian/recursion-context": "^3.0 || ^4.0"
             },
             "require-dev": {
-                "phpspec/phpspec": "^6.0",
+                "phpspec/phpspec": "^6.0 || ^7.0",
                 "phpunit/phpunit": "^8.0 || ^9.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.11.x-dev"
+                    "dev-master": "1.x-dev"
                 }
             },
             "autoload": {
@@ -3540,22 +3541,67 @@
             ],
             "support": {
                 "issues": "https://github.com/phpspec/prophecy/issues",
-                "source": "https://github.com/phpspec/prophecy/tree/1.13.0"
+                "source": "https://github.com/phpspec/prophecy/tree/1.14.0"
+            },
+            "time": "2021-09-10T09:02:12+00:00"
+        },
+        {
+            "name": "phpstan/extension-installer",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/extension-installer.git",
+                "reference": "66c7adc9dfa38b6b5838a9fb728b68a7d8348051"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/extension-installer/zipball/66c7adc9dfa38b6b5838a9fb728b68a7d8348051",
+                "reference": "66c7adc9dfa38b6b5838a9fb728b68a7d8348051",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.1 || ^2.0",
+                "php": "^7.1 || ^8.0",
+                "phpstan/phpstan": ">=0.11.6"
+            },
+            "require-dev": {
+                "composer/composer": "^1.8",
+                "phing/phing": "^2.16.3",
+                "php-parallel-lint/php-parallel-lint": "^1.2.0",
+                "phpstan/phpstan-strict-rules": "^0.11 || ^0.12"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "PHPStan\\ExtensionInstaller\\Plugin"
+            },
+            "autoload": {
+                "psr-4": {
+                    "PHPStan\\ExtensionInstaller\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "Composer plugin for automatic installation of PHPStan extensions",
+            "support": {
+                "issues": "https://github.com/phpstan/extension-installer/issues",
+                "source": "https://github.com/phpstan/extension-installer/tree/1.1.0"
             },
-            "time": "2021-03-17T13:42:18+00:00"
+            "time": "2020-12-13T13:06:13+00:00"
         },
         {
             "name": "phpstan/phpstan",
-            "version": "0.12.88",
+            "version": "0.12.99",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "464d1a81af49409c41074aa6640ed0c4cbd9bb68"
+                "reference": "b4d40f1d759942f523be267a1bab6884f46ca3f7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/464d1a81af49409c41074aa6640ed0c4cbd9bb68",
-                "reference": "464d1a81af49409c41074aa6640ed0c4cbd9bb68",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/b4d40f1d759942f523be267a1bab6884f46ca3f7",
+                "reference": "b4d40f1d759942f523be267a1bab6884f46ca3f7",
                 "shasum": ""
             },
             "require": {
@@ -3586,13 +3632,17 @@
             "description": "PHPStan - PHP Static Analysis Tool",
             "support": {
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/0.12.88"
+                "source": "https://github.com/phpstan/phpstan/tree/0.12.99"
             },
             "funding": [
                 {
                     "url": "https://github.com/ondrejmirtes",
                     "type": "github"
                 },
+                {
+                    "url": "https://github.com/phpstan",
+                    "type": "github"
+                },
                 {
                     "url": "https://www.patreon.com/phpstan",
                     "type": "patreon"
@@ -3602,31 +3652,84 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-05-17T12:24:49+00:00"
+            "time": "2021-09-12T20:09:55+00:00"
+        },
+        {
+            "name": "phpstan/phpstan-phpunit",
+            "version": "0.12.22",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpstan-phpunit.git",
+                "reference": "7c01ef93bf128b4ac8bdad38c54b2a4fd6b0b3cc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan-phpunit/zipball/7c01ef93bf128b4ac8bdad38c54b2a4fd6b0b3cc",
+                "reference": "7c01ef93bf128b4ac8bdad38c54b2a4fd6b0b3cc",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1 || ^8.0",
+                "phpstan/phpstan": "^0.12.92"
+            },
+            "conflict": {
+                "phpunit/phpunit": "<7.0"
+            },
+            "require-dev": {
+                "php-parallel-lint/php-parallel-lint": "^1.2",
+                "phpstan/phpstan-strict-rules": "^0.12.6",
+                "phpunit/phpunit": "^9.5"
+            },
+            "type": "phpstan-extension",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.12-dev"
+                },
+                "phpstan": {
+                    "includes": [
+                        "extension.neon",
+                        "rules.neon"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PHPStan\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "PHPUnit extensions and rules for PHPStan",
+            "support": {
+                "issues": "https://github.com/phpstan/phpstan-phpunit/issues",
+                "source": "https://github.com/phpstan/phpstan-phpunit/tree/0.12.22"
+            },
+            "time": "2021-08-12T10:53:43+00:00"
         },
         {
             "name": "phpstan/phpstan-strict-rules",
-            "version": "0.12.9",
+            "version": "0.12.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan-strict-rules.git",
-                "reference": "0705fefc7c9168529fd130e341428f5f10f4f01d"
+                "reference": "2b72e8e17d2034145f239126e876e5fb659675e2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan-strict-rules/zipball/0705fefc7c9168529fd130e341428f5f10f4f01d",
-                "reference": "0705fefc7c9168529fd130e341428f5f10f4f01d",
+                "url": "https://api.github.com/repos/phpstan/phpstan-strict-rules/zipball/2b72e8e17d2034145f239126e876e5fb659675e2",
+                "reference": "2b72e8e17d2034145f239126e876e5fb659675e2",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1 || ^8.0",
-                "phpstan/phpstan": "^0.12.66"
+                "phpstan/phpstan": "^0.12.96"
             },
             "require-dev": {
-                "phing/phing": "^2.16.3",
                 "php-parallel-lint/php-parallel-lint": "^1.2",
                 "phpstan/phpstan-phpunit": "^0.12.16",
-                "phpunit/phpunit": "^7.5.20"
+                "phpunit/phpunit": "^9.5"
             },
             "type": "phpstan-extension",
             "extra": {
@@ -3651,29 +3754,29 @@
             "description": "Extra strict and opinionated rules for PHPStan",
             "support": {
                 "issues": "https://github.com/phpstan/phpstan-strict-rules/issues",
-                "source": "https://github.com/phpstan/phpstan-strict-rules/tree/0.12.9"
+                "source": "https://github.com/phpstan/phpstan-strict-rules/tree/0.12.11"
             },
-            "time": "2021-01-13T08:50:28+00:00"
+            "time": "2021-08-21T11:36:27+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "9.2.6",
+            "version": "9.2.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "f6293e1b30a2354e8428e004689671b83871edde"
+                "reference": "d4c798ed8d51506800b441f7a13ecb0f76f12218"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/f6293e1b30a2354e8428e004689671b83871edde",
-                "reference": "f6293e1b30a2354e8428e004689671b83871edde",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/d4c798ed8d51506800b441f7a13ecb0f76f12218",
+                "reference": "d4c798ed8d51506800b441f7a13ecb0f76f12218",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-libxml": "*",
                 "ext-xmlwriter": "*",
-                "nikic/php-parser": "^4.10.2",
+                "nikic/php-parser": "^4.12.0",
                 "php": ">=7.3",
                 "phpunit/php-file-iterator": "^3.0.3",
                 "phpunit/php-text-template": "^2.0.2",
@@ -3722,7 +3825,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.6"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.7"
             },
             "funding": [
                 {
@@ -3730,7 +3833,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-03-28T07:26:59+00:00"
+            "time": "2021-09-17T05:39:03+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -3975,16 +4078,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.4",
+            "version": "9.5.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "c73c6737305e779771147af66c96ca6a7ed8a741"
+                "reference": "c814a05837f2edb0d1471d6e3f4ab3501ca3899a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c73c6737305e779771147af66c96ca6a7ed8a741",
-                "reference": "c73c6737305e779771147af66c96ca6a7ed8a741",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c814a05837f2edb0d1471d6e3f4ab3501ca3899a",
+                "reference": "c814a05837f2edb0d1471d6e3f4ab3501ca3899a",
                 "shasum": ""
             },
             "require": {
@@ -3996,11 +4099,11 @@
                 "ext-xml": "*",
                 "ext-xmlwriter": "*",
                 "myclabs/deep-copy": "^1.10.1",
-                "phar-io/manifest": "^2.0.1",
+                "phar-io/manifest": "^2.0.3",
                 "phar-io/version": "^3.0.2",
                 "php": ">=7.3",
                 "phpspec/prophecy": "^1.12.1",
-                "phpunit/php-code-coverage": "^9.2.3",
+                "phpunit/php-code-coverage": "^9.2.7",
                 "phpunit/php-file-iterator": "^3.0.5",
                 "phpunit/php-invoker": "^3.1.1",
                 "phpunit/php-text-template": "^2.0.3",
@@ -4014,7 +4117,7 @@
                 "sebastian/global-state": "^5.0.1",
                 "sebastian/object-enumerator": "^4.0.3",
                 "sebastian/resource-operations": "^3.0.3",
-                "sebastian/type": "^2.3",
+                "sebastian/type": "^2.3.4",
                 "sebastian/version": "^3.0.2"
             },
             "require-dev": {
@@ -4062,7 +4165,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.4"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.10"
             },
             "funding": [
                 {
@@ -4074,7 +4177,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-03-23T07:16:29+00:00"
+            "time": "2021-09-25T07:38:51+00:00"
         },
         {
             "name": "psr/cache",
@@ -5419,16 +5522,16 @@
         },
         {
             "name": "sebastian/global-state",
-            "version": "5.0.2",
+            "version": "5.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/global-state.git",
-                "reference": "a90ccbddffa067b51f574dea6eb25d5680839455"
+                "reference": "23bd5951f7ff26f12d4e3242864df3e08dec4e49"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/a90ccbddffa067b51f574dea6eb25d5680839455",
-                "reference": "a90ccbddffa067b51f574dea6eb25d5680839455",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/23bd5951f7ff26f12d4e3242864df3e08dec4e49",
+                "reference": "23bd5951f7ff26f12d4e3242864df3e08dec4e49",
                 "shasum": ""
             },
             "require": {
@@ -5471,7 +5574,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/global-state/issues",
-                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.2"
+                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.3"
             },
             "funding": [
                 {
@@ -5479,7 +5582,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-10-26T15:55:19+00:00"
+            "time": "2021-06-11T13:31:12+00:00"
         },
         {
             "name": "sebastian/lines-of-code",
@@ -5766,20 +5869,21 @@
                     "type": "github"
                 }
             ],
+            "abandoned": true,
             "time": "2020-09-28T06:45:17+00:00"
         },
         {
             "name": "sebastian/type",
-            "version": "2.3.1",
+            "version": "2.3.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/type.git",
-                "reference": "81cd61ab7bbf2de744aba0ea61fae32f721df3d2"
+                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/81cd61ab7bbf2de744aba0ea61fae32f721df3d2",
-                "reference": "81cd61ab7bbf2de744aba0ea61fae32f721df3d2",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/b8cd8a1c753c90bc1a0f5372170e3e489136f914",
+                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914",
                 "shasum": ""
             },
             "require": {
@@ -5814,7 +5918,7 @@
             "homepage": "https://github.com/sebastianbergmann/type",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/type/issues",
-                "source": "https://github.com/sebastianbergmann/type/tree/2.3.1"
+                "source": "https://github.com/sebastianbergmann/type/tree/2.3.4"
             },
             "funding": [
                 {
@@ -5822,7 +5926,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-10-26T13:18:59+00:00"
+            "time": "2021-06-15T12:49:02+00:00"
         },
         {
             "name": "sebastian/version",
@@ -6409,16 +6513,16 @@
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.2.0",
+            "version": "1.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "75a63c33a8577608444246075ea0af0d052e452a"
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/75a63c33a8577608444246075ea0af0d052e452a",
-                "reference": "75a63c33a8577608444246075ea0af0d052e452a",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/34a41e998c2183e22995f158c581e7b5e755ab9e",
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e",
                 "shasum": ""
             },
             "require": {
@@ -6447,7 +6551,7 @@
             "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"
+                "source": "https://github.com/theseer/tokenizer/tree/1.2.1"
             },
             "funding": [
                 {
@@ -6455,7 +6559,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-07-12T23:59:07+00:00"
+            "time": "2021-07-28T10:34:58+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -6577,5 +6681,5 @@
         "php": "^7.4.0|^8.0.0"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.1.0"
 }
diff --git a/src/bitExpert/CaptainHook/Infection/InfectionAction.php b/src/bitExpert/CaptainHook/Infection/InfectionAction.php
index 3077736..ddeb3bd 100644
--- a/src/bitExpert/CaptainHook/Infection/InfectionAction.php
+++ b/src/bitExpert/CaptainHook/Infection/InfectionAction.php
@@ -41,7 +41,7 @@ public function execute(Config $config, IO $io, Repository $repository, Config\A
 
         $changedPHPFiles = $repository->getIndexOperator()->getStagedFilesOfType('php');
         if (count($changedPHPFiles) > 0) {
-            array_walk($changedPHPFiles, function (&$item, $key) {
+            array_walk($changedPHPFiles, function (&$item, $key): void {
                 $item = escapeshellarg($item);
             });
             $infectionArgs[] = '--filter='.implode(',', $changedPHPFiles);
@@ -51,18 +51,18 @@ public function execute(Config $config, IO $io, Repository $repository, Config\A
         if (!$result->isSuccessful()) {
             $errorMessage = '<error>Running Infection failed!</error>';
 
-            if (!empty($result->getStdOut())) {
+            if ($result->getStdOut() !== '') {
                 $errorMessage .= PHP_EOL . $result->getStdOut();
             }
 
-            if (!empty($result->getStdErr())) {
+            if ($result->getStdErr() !== '') {
                 $errorMessage .= PHP_EOL . $result->getStdErr();
             }
 
             throw new ActionFailed($errorMessage);
         }
 
-        if (!empty($result->getStdOut())) {
+        if ($result->getStdOut() !== '') {
             $io->write($result->getStdOut());
         }
     }