Issue #2780203: update existing configuration items

<?php

/**

 * @file

 * Install, update and uninstall functions for the Blog module.

 */

/**

 * Add enforced configuration dependencies.

 */

function blog_update_9001(&$sandbox) {

  $config_items = [

    'core.entity_form_display.node.blog_post.default',

    'core.entity_view_display.node.blog_post.default',

    'core.entity_view_display.node.blog_post.teaser',

    'field.field.node.blog_post.body',

    'field.field.node.blog_post.field_blog_comments',

    'field.field.node.blog_post.field_blog_tags',

    'field.storage.node.field_blog_comments',

    'field.storage.node.field_blog_tags',

    'node.type.blog_post',

    'views.view.blog',

  ];

  foreach ($config_items as $config_item) {

    $config = \Drupal::configFactory()->getEditable($config_item);

    $dependencies = $config->get('dependencies');

    $dependencies['enforced']['module'][] = 'blog';

    $config->set('dependencies', $dependencies)->save(TRUE);

  }

}