Log Message:
py-celery: updated to 5.0.5

5.0.5
=====
- Ensure keys are strings when deleting results from S3
- Fix a regression breaking `celery --help` and `celery events`

5.0.4
=====
-  DummyClient of cache+memory:// backend now shares state between threads

   This fixes a problem when using our pytest integration with the in memory
   result backend.
   Because the state wasn't shared between threads, 6416 results in test suites
   hanging on `result.get()`.

5.0.3
=====
- Make `--workdir` eager for early handling
- When using the MongoDB backend, don't cleanup if result_expires is 0 or None
- Fix passing queues into purge command
- Restore `app.start()` and `app.worker_main()`
- Detaching no longer creates an extra log file
- Result backend instances are now thread local to ensure thread safety
- Don't upgrade click to 8.x since click-repl doesn't support it yet.
- Restore preload options

5.0.2
=====
- Fix _autodiscover_tasks_from_fixups
- Flush worker prints, notably the banner
- **Breaking Change**: Remove `ha_policy` from queue definition.

    This argument has no effect since RabbitMQ 3.0.
    Therefore, We feel comfortable dropping it in a patch release.

- Python 3.9 support
- **Regression**: When using the prefork pool, pick the fair scheduling strategy \ 
by default
- Preserve callbacks when replacing a task with a chain
- Fix max_retries override on `self.retry()`
- Raise proper error when replacing with an empty chain

5.0.1
=====
- Specify UTF-8 as the encoding for log files
- Custom headers now propagate when using the protocol 1 hybrid messages
- Retry creating the database schema for the database results backend
  in case of a race condition
- When using the Redis results backend, awaiting for a chord no longer hangs
  when setting :setting:`result_expires` to 0
- When a user tries to specify the app as an option for the subcommand,
  a custom error message is displayed
- Fix the `--without-gossip`, `--without-mingle`, and `--without-heartbeat`
  options which now work as expected.
- Provide a clearer error message when the application cannot be loaded.
- Avoid printing deprecation warnings for settings when they are loaded from
  Django settings
- Allow lowercase log levels for the `--loglevel` option
- Detaching now works as expected
- Restore broadcasting messages from `celery control`
- Pass back real result for single task chains
- Ensure group tasks a deeply serialized
- Fix chord element counting
- Restore the `celery shell` command

5.0.0
=====
- **Breaking Change** Remove AMQP result backend
- Warn when deprecated settings are used
- Expose retry_policy for Redis result backend
- Prepare Celery to support the yet to be released Python 3.9

5.0.0rc3
========
- More cleanups of leftover Python 2 support

5.0.0rc2
========
- Bump minimum required eventlet version to 0.26.1.
- Update Couchbase Result backend to use SDK V3.
- Restore monkeypatching when gevent or eventlet are used.

5.0.0rc1
========
- Allow to opt out of ordered group results when using the Redis result backend
- **Breaking Change** Remove the deprecated celery.utils.encoding module.

5.0.0b1
=======
- **Breaking Change** Drop support for the Riak result backend
- **Breaking Change** pytest plugin is no longer enabled by default
  Install pytest-celery to enable it.
- **Breaking Change** Brand new CLI based on Click

5.0.0a2
=======
- Bump Kombu version to 5.0

5.0.0a1
=======
- Removed most of the compatibility code that supports Python 2
- Modernized code to work on Python 3.6 and above