Breaking changes

• Remove support for Python 3.9 as it reaches end-of-life next month (by @jodal in #238)
• Only allow one of Future's set(), set_exception(), and set_get_hook() methods to be called (by @jodal in #240)

Changes

• Change ThreadingFuture[T] to use a threading.Condition instead of queue.Queue (by @mpdetwiler in #233)
• Only call future hook once, even if it returns None (by @jodal in #239)
• Use the standard library's tomllib in the docs build on Python 3.11+, removing a dependency om tomli (by @a-detiste in #237)

New Contributors

• @a-detiste made their first contribution in #237
• @mpdetwiler made their first contribution in #233

Full Changelog: v4.2.0...v4.3.0