- update to 3.4.0:
* Added context propagation to/from worker threads in ``to_thread.run_sync()``,
``from_thread.run()`` and ``from_thread.run_sync()``
* Fixed race condition in ``Lock`` and ``Semaphore`` classes when a task waiting on ``acquire()``
is cancelled while another task is waiting to acquire the same primitive
* Fixed async context manager's ``__aexit__()`` method not being called in
``BlockingPortal.wrap_async_context_manager()`` if the host task is cancelled
* Fixed worker threads being marked as being event loop threads in sniffio
* Fixed task parent ID not getting set to the correct value on asyncio
* Enabled the test suite to run without IPv6 support, trio or pytest plugin autoloading