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* BREAKING CHANGE: WebSockets must now be explicitly accepted or denied.
See https://channels.readthedocs.io/en/latest/releases/1.0.0.html for more.
* BREAKING CHANGE: Demultiplexers have been overhauled to directly dispatch
messages rather than using channels to new consumers. Consult the docs on
generic consumers for more: https://channels.readthedocs.io/en/latest/generics.html
* BREAKING CHANGE: Databinding now operates from implicit group membership,
where your code just has to say what groups would be used and Channels will
work out if it's a creation, modification or removal from a client's
perspective, including with permissions.
* Delay protocol server ships with Channels providing a specification on how
to delay jobs until later and a reference implementation.
* Serializers can now specify fields as `__all__` to auto-include all fields.
* Various other small fixes.