Add phpstan check

.editorconfig

@@ -9,3 +9,6 @@ charset = utf-8
 
 [*.json]
 indent_size = 2
+
+[composer.json]
+indent_size = 4

.github/workflows/checks.yml

@@ -30,3 +30,13 @@ jobs:
             - run: npm run build
 
             - run: npm test
+
+            - uses: shivammathur/setup-php@v2
+              with:
+                  php-version: 8.3
+                  tools: composer:v2
+                  ini-file: development
+
+            - run: composer install
+
+            - run: composer phpstan

.gitignore

@@ -1,6 +1,6 @@
 node_modules/
 .idea
 .DS_Store
-build
 dist/
 build/
+vendor/

composer.json

@@ -1,12 +1,18 @@
 {
-  "name": "weglot/languages",
-  "description": "A comprehensive dataset containing language codes and names compatible with Weglot.",
-  "type": "library",
-  "minimum-stability": "stable",
-  "license": "proprietary",
-  "autoload": {
-    "psr-4": {
-      "WeglotLanguages\\": "dist/"
+    "name": "weglot/languages",
+    "description": "A comprehensive dataset containing language codes and names compatible with Weglot.",
+    "type": "library",
+    "minimum-stability": "stable",
+    "license": "proprietary",
+    "autoload": {
+        "psr-4": {
+            "WeglotLanguages\\": "dist/"
+        }
+    },
+    "require-dev": {
+        "phpstan/phpstan": "1.11.*"
+    },
+    "scripts": {
+        "phpstan": "vendor/bin/phpstan"
     }
-  }
 }

phpstan.dist.neon

@@ -0,0 +1,13 @@
+includes:
+    - vendor/phpstan/phpstan/conf/bleedingEdge.neon
+
+parameters:
+    level: 9
+    paths:
+        - dist/
+    exceptions:
+        check:
+            missingCheckedExceptionInThrows: true
+            tooWideThrowType: true
+        reportUncheckedExceptionDeadCatch: false
+        implicitThrows: false