Hey, Drupal 8.8.0 has a defined Composer behavior!
That's right, Drupal 8.8.0 is Composer-first. That means you can build it from an official, signed-off-by-maintainers type Composer project template. You can do this:
$ composer create-project drupal/recommended-project:^8.8.0 my_web_directory
This is a big deal because previously you had to use a third-party Composer project template to be able to build a codebase that didn't completely misunderstand you when you subsequently typed: