Applying patches to contributed modules

edit composer.json adding patch info and url:

"drupal/menu_item_role_access": {
    "Call to a member function hasField() on null- https://www.drupal.org/project/menu_item_role_access/issues/3197539": "https://www.drupal.org/files/issues/2021-02-09/hasField-on-null-3197539-2.patch"
},

run patch on specific module:

composer update drupal/menu_item_role_access