@onlyworlds/sdk 4.12.0

Added

• Joining a world by link (keel #212). previewJoin(code) reads what a join code holds
  without using it (OwJoinPreview: reader, world, invited_by, owner_character,
  role, with_character, expires_at) and sends no credential, whatever key the client
  holds. acceptJoin(code) accepts an invite link as the account behind the client's ow_a_
  token and returns the new membership (OwJoinedMembership, roster_character included);
  a world key is a TypeError before anything is sent. New getters on OwApiError:
  isNotFound (every bad code is one 404), isAlreadyMember and isPinRequired (the two
  409s, told apart by code). Shapes read from keel's code (accounts/join_api.py,
  accounts/api.py), since the OpenAPI document gives no response bodies for these routes.
  Checked live: a bad code on production answers isNotFound. A real accept has not been
  run from here (no account token); Lantern's door is its first live use.