Log Message:
devel/ruby-zeitwerk: update to 2.3.0

Update ruby-zeitwerk to 2.3.0.

2.3.0 (3 March 2020)

* Adds support for collapsing directories.

  For example, if booking/actions/create.rb is meant to define
  Booking::Create because the subdirectory actions is there only for
  organizational purposes, you can tell Zeitwerk with collapse:

	loader.collapse("booking/actions")

  The method also accepts glob patterns to support standardized project
  structures:

	loader.collapse("*/actions")

  Please check the documentation for more details.

* Eager loading is idempotent, but now you can eager load again after
  reloading.