libdex 0.4.3
============

This release contains a few more followup fixes for fallback scheduling,
particularly on Linux systems without io_uring. We've also enabled CI
to test this situation more closely as we're most likely to run into it
on distribution build systems running older Linux kernels.

 * New build options for disabling io_uring and eventfd support which
   enable testing more fallback paths in CI.
 * Worker threads will now use a GMainLoop instead iterating GMainContext
   manually.
 * An idle is used for scheduling work items directly onto a worker thread
   instead of going through the global work queue when not already running
   on a worker thread. Otherwise the lock-free work queue is used.
 * A fix for a potential deadlock when failing to create an additional
   worker thread.
 * Fix a release build warning.