Installation
Modules doesn't requires any special dependencies, it uses default Drupal core dependency doctrine/annotation
and XMLWriter from php. You can install it as usual.
Composer
If your project is maintained with composer, install via it:
composer require drupal/yandex_yml
Attention! Before module will be stable, better to lock module version for safety. If some methods will change, your code will not be destroyed. Better update it manually and read changelog.