I feel like getting notifications about a board's background being
changed isn't very useful information and could interrupt the flow
of other important information such as Card changes or movement,
so I think we should not support this event and
should simply ignore such payloads in the future.
All webhook fixtures in zerver/fixtures/<webhook_name> have now
been moved to dedicated webhook-specific directories under
zerver/webhooks/<webhook_name>/fixtures, where <webhook_name> is
the name of the webhook.
Eeshan Garg
Marco Matarazzo