Unable to install module with MySQL/MariaDB character set of utf8mb4

Hi,

I'm unable to install this module with MariaDB 5.5.56 and a character set of utf8mb4. Here's the error I'm receiving:

Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[HY000]: General error: 1709 Index column size
too large. The maximum column size is 767 bytes.: CREATE TABLE {nodeaccess} (
`nid` INT unsigned NOT NULL DEFAULT 0,
`gid` INT unsigned NOT NULL DEFAULT 0,
`realm` VARCHAR(255) NOT NULL DEFAULT '',
`grant_view` TINYINT unsigned NOT NULL DEFAULT 0,
`grant_update` TINYINT unsigned NOT NULL DEFAULT 0,
`grant_delete` TINYINT unsigned NOT NULL DEFAULT 0,
PRIMARY KEY (`nid`, `gid`, `realm`)
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8mb4;

Upon further investigation I found this page: http://mysql.rjweb.org/doc.php/index_cookbook_mysql#limitations

In 5.6 / 10.0, you may not include a column that equates to bigger than 767 bytes: VARCHAR(255) CHARACTER SET utf8 or VARCHAR(191) CHARACTER SET utf8mb4

I can confirm that changing the column length to 191 works.