cannot update Craft CMS - composer errors
composer update vendor/package by design does not update the dependencies of vendor/package. Instead, use

composer require --update-with-dependencies craftcms/cms:3.0.41.1


Per the docs, --update-with-dependencies will


  Also update dependencies of the newly required packages, except those that are root requirements


That will update Craft to 3.0.41.1 and, because 3.0.41.1 has a new Twig requirement (~2.6.2, where 3.0.41 used ^2.5.0), it will update Twig as well.