add phpstan (#926)

composer.json

@@ -29,7 +29,8 @@
         "league/flysystem-aws-s3-v3": "^3.0",
         "doctrine/dbal": "^2.10",
         "spatie/valuestore": "^1.2.5",
-        "pestphp/pest": "^1.21"
+        "pestphp/pest": "^1.21",
+        "nunomaduro/larastan": "^1.0"
     },
     "autoload": {
         "psr-4": {

phpstan.neon

@@ -0,0 +1,18 @@
+includes:
+    - ./vendor/nunomaduro/larastan/extension.neon
+
+parameters:
+    paths:
+        - src
+        # - tests
+
+    level: 8
+
+    universalObjectCratesClasses:
+        - Illuminate\Routing\Route
+
+    ignoreErrors:
+
+    checkMissingIterableValueType: false
+    treatPhpDocTypesAsCertain: false
+