message: add a test for php 7.3
diff: project: ci-drupal
  branch: drupal8-composer-72-mariadb
  +- include: drupal/drupal.yaml
  + vars:
  + testname: "Drupal 8 composer PHP 7.3 - MARIADB"
  + drupal_version: 8
  + db: mariadb
  + php_version: 7.3
  + git_repo_name: drupal.git
  + project: ci-drupal
  + branch: drupal8-composer-73-mariadb
  +
  +
  - include: drupal/drush.yaml
  vars:
  testname: "DRUSH"
  