fix: Restore check helpers

Author: neznaika0

phpstan-baseline.php

@@ -7,6 +7,12 @@
 	'count' => 1,
 	'path' => __DIR__ . '/app/Config/Filters.php',
 ];
+$ignoreErrors[] = [
+	// identifier: isset.property
+	'message' => '#^Property Config\\\\Autoload\\:\\:\\$helpers \\(array\\<int, string\\>\\) in isset\\(\\) is not nullable\\.$#',
+	'count' => 1,
+	'path' => __DIR__ . '/system/Autoloader/Autoloader.php',
+];
 $ignoreErrors[] = [
 	// identifier: missingType.iterableValue
 	'message' => '#^Method CodeIgniter\\\\BaseModel\\:\\:__call\\(\\) has parameter \\$params with no value type specified in iterable type array\\.$#',

system/Autoloader/Autoloader.php

@@ -123,7 +123,7 @@ public function initialize(Autoload $config, Modules $modules)
             $this->files = $config->files;
         }
 
-        if ($config->helpers !== []) {
+        if (isset($config->helpers)) {
             $this->helpers = [...$this->helpers, ...$config->helpers];
         }