I can not install dulma_companion on Drupal 10. drulma_companion requires drupal/core_event_dispatcher which has been removed in Drupal 10.
I believe core_event_dispatcher should be removed as a requirement to provide Drupal 10 compatibility.
composer require 'drupal/drulma_companion:^2.1' -W
Problem 1
- drupal/drulma_companion[2.1.5, ..., 2.1.6] require drupal/core_event_dispatcher ^3 || ^4 -> satisfiable by drupal/core_event_dispatcher[3.0.0, ..., 3.3.4].
- drupal/drulma_companion[2.1.3, ..., 2.1.4] require drupal/core_event_dispatcher ^3 -> satisfiable by drupal/core_event_dispatcher[3.0.0, ..., 3.3.4].
- drupal/drulma_companion[2.1.0, ..., 2.1.2] require drupal/core ^9.3 -> found drupal/core[9.3.0, ..., 9.5.11] but these were not loaded, likely because it conflicts with another require.
- drupal/core_event_dispatcher[3.3.0, ..., 3.3.4] require drupal/core ^9.3 -> found drupal/core[9.3.0, ..., 9.5.11] but these were not loaded, likely because it conflicts with another require.
- drupal/core_event_dispatcher[3.0.0, ..., 3.2.0] require drupal/core ^8 || ^9 -> found drupal/core[8.0.0, ..., 8.9.20, 9.0.0, ..., 9.5.11] but these were not loaded, likely because it conflicts with another require.
- Root composer.json requires drupal/drulma_companion ^2.1 -> satisfiable by drupal/drulma_companion[2.1.0, ..., 2.1.6].