Release Candidate (RC) version 4. The structure is therefore correct for future versions
Please note that version 3 is no longer maintained, and all developments are now based on version 4.
Several bugs have been corrected, so it's recommended to upgrade to version 4. Migration from v3 to v4 is not very complex and only takes a few minutes:
https://docs.rpgjs.dev/migration/to-v4.html