Log Message:
py-daphne: updated to 2.2.2

2.2.2:
* X-Forwarded-Proto support is now present and enabled if you turn on the
  --proxy-headers flag
* ASGI applications are no longer instantiated in a thread (the ASGI spec
  was finalised to say all constructors must be non-blocking on the main thread)

2.2.1:
* Python 3.7 compatability is flagged and ensured by using Twisted 18.7 and
  above as a dependency.
* The send() awaitable in applications no longer blocks if the connection is
  closed.
* Fixed a race condition where applications would be cleaned up before they
  had even started.