addtocalendar-8.x-3.x-dev/addtocalendar.install

<?php

/**
 * @file
 * Update hooks, etc.
 */

/**
 * #3092765: Re-save addtocalendar field config with new schema.
 */
function addtocalendar_update_9200() {
  $fields = \Drupal::entityTypeManager()->getStorage('field_config')->loadByProperties(['field_type' => 'add_to_calendar_field']);
  foreach ($fields as $field) {
    $field->save();
  }
}