Checking level 4 errors

Author: devnix

phpstan.dist.neon

@@ -1,5 +1,5 @@
 parameters:
-    level: 1
+    level: 4
     paths:
     - src
     - tests

src/Scanner/ParsedFunction.php

@@ -24,7 +24,7 @@ public function __construct(string $name, string $filename, int $line, ?int $las
         $this->lastLine = isset($lastLine) ? $lastLine : $line;
     }
 
-    public function __debugInfo()
+    public function __debugInfo(): array
     {
         return $this->toArray();
     }