Add phpstan

composer.json

@@ -11,7 +11,8 @@
   "require-dev": {
     "phpunit/phpunit": "^9",
     "vimeo/psalm": "^4.29",
-    "friendsofphp/php-cs-fixer": "^3.12"
+    "friendsofphp/php-cs-fixer": "^3.12",
+    "phpstan/phpstan": "^1.8"
   },
   "autoload": {
     "psr-4": {
@@ -19,6 +20,14 @@
     }
   },
   "scripts": {
+    "phpstan": [
+      "@php vendor/bin/phpstan analyze --ansi"
+    ],
+    "lint": [
+      "@composer run cs",
+      "@composer run phpstan",
+      "@composer run psalm"
+    ],
     "cs-fix": [
       "@php vendor/bin/php-cs-fixer --ansi fix"
     ],

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": "a07c10824a049d863d07938d5ea4c02e",
+    "content-hash": "9270d0bb7a9d8800ee9938944418f783",
     "packages": [],
     "packages-dev": [
         {
@@ -1415,6 +1415,65 @@
             ],
             "time": "2020-07-08T12:44:21+00:00"
         },
+        {
+            "name": "phpstan/phpstan",
+            "version": "1.8.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpstan/phpstan.git",
+                "reference": "0c4459dc42c568b818b3f25186589f3acddc1823"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/0c4459dc42c568b818b3f25186589f3acddc1823",
+                "reference": "0c4459dc42c568b818b3f25186589f3acddc1823",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2|^8.0"
+            },
+            "conflict": {
+                "phpstan/phpstan-shim": "*"
+            },
+            "bin": [
+                "phpstan",
+                "phpstan.phar"
+            ],
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "PHPStan - PHP Static Analysis Tool",
+            "keywords": [
+                "dev",
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/phpstan/phpstan/issues",
+                "source": "https://github.com/phpstan/phpstan/tree/1.8.10"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/ondrejmirtes",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/phpstan",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/phpstan/phpstan",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-10-17T14:23:35+00:00"
+        },
         {
             "name": "phpunit/php-code-coverage",
             "version": "8.0.2",