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This release is backwards-compatible with v0.21.
Changes are non-breaking, unless you upgrade from v0.22.

- BREAKING: The *asyncio_event_loop* mark has been removed. Event loops with class, module, package, and session scopes can be requested via the *scope* keyword argument to the _asyncio_ mark.
- Introduces the *event_loop_policy* fixture which allows testing with non-default or multiple event loops  `#662 <https://github.com/pytest-dev/pytest-asyncio/pull/662>`_
- Removes pytest-trio from the test dependencies `#620 <https://github.com/pytest-dev/pytest-asyncio/pull/620>`_