- Update to 0.25.0
* New helper classes: RaisesGroup and Matcher.
* MultiError has been fully removed, and all relevant trio
functions now raise ExceptionGroups instead.
* The strict_exception_groups parameter now defaults to True
in trio.run and trio.lowlevel.start_guest_run.
* Add trio.testing.wait_all_threads_completed, which blocks
until no threads are running tasks.
* Path is now a subclass of pathlib.PurePath, allowing it to
interoperate with other standard pathlib types.