* Add psr-4 for the internal classes -- this is a temp. changes. We should remove it once we completely merge to the core
* Register class aliases
* Move WcPayPromotion classes to the internal
* Ignore namespace PHP CS issue
* Make features/WcPayPromotion internal
* Added src-internal directory for Automattic\WooCommerce\Internal\Admin namespace
* Moved src/Features/WcPayPromotion to src-internal/Admin/WcPayPromotion
* Add phpcs rules for src-internal
* Remove phpcs:ignoreFile
* Update letter case to make it PSR4 compatible
* Fix letter cases
* Move the alias array into the function
* Rename WcPayPromotion to WCPayPromotion (letter case update)
* Include src-internal
* Update letter case
* Make src/Schedulers/* internal, except the SchedulerTraits
* Add @internal comment tag
* Clean up incorrect import
* Remove unused import
* Don't require package tag or file comment inside src
* Removed package tag from files inside src
* Fixed tests directory in phpcs.xml.dist
* Fixed usage of package tag
* Fixed new classes
* Fixed coding standards
* Fixed coding standards in tests
* Manually call on_plugins_loaded after loading plugins for testing
* Update import tests to cancel all pending actions in new AS tables
* Fix deprecated next method in AS
* Remove priority queue test for unused priority in AS 3.0
* Check only for pending status actions in batch queue tests
* Add cancel_actions_by_group method to WPPostStore
* Add method to check for next blocking job time
* Force delete scheduled actions on older versions of AS