myLibrariesLoader.module

<?php

/**
 * Implements hook_page_attachments().
 * @param array $attachments
 */
function myLibrariesLoader_page_attachments(array &$attachments) {
    //add here any conditions if you need to limit the pages

    $attachments['#attached']['library'][] = 'myLibrariesLoader/library_one';
    $attachments['#attached']['library'][] = 'myLibrariesLoader/library_two';
}