chore(deps): update dependency @sanity/bifur-client to ^0.4.0

[rexxars]

Description

The new bifur client introduced a breaking change, where subscription based methods have to be called on the listen() method instead of on the request() method. This makes it more obvious that they're going to provide values over time and not a one-off response. Additionally, it allows reusing the same base method name for both subscriptions and one-off requests, eg authorize vs authorize_subscribe.

What to review

Presence still work as before.

Testing

Only a dependency upgrade, so should not be necessary.

Notes for release

None