With V13 newly created, and V20 branch cut, it is time to switch Alpha to use the new environment.

This patch follows the procedure described in protocol_environment_upgrade.rst and issue #4155.

Manually testing the MR

Checklist

Document the interface of any function added or modified (see the coding guidelines)
Document any change to the user interface, including configuration parameters (see node configuration)
Provide automatic testing (see the testing guide).
For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
Select suitable reviewers using the Reviewers field below.
Select as Assignee the next person who should take action on that MR

Edited Apr 23, 2024 by Raphaël Cauderlier