populate missing array value types in utils namespace, pass 2

src/pocketmine/utils/Config.php

@@ -494,7 +494,8 @@ class Config{
 	}
 
 	/**
-	 * @param array $data reference parameter
+	 * @param mixed[] $default
+	 * @param mixed[] $data reference parameter
 	 */
 	private function fillDefaults(array $default, &$data) : int{
 		$changed = 0;

src/pocketmine/utils/MainLogger.php

@@ -188,7 +188,7 @@ class MainLogger extends \AttachableThreadedLogger{
 	}
 
 	/**
-	 * @param array|null $trace
+	 * @param mixed[][]|null $trace
 	 *
 	 * @return void
 	 */