* Add async strategies

* Fix init typing

* Reuse is_coroutine_callable

* Keep only async predicate overrides and DRY implementations

* Ensure async and/or versions called when necessary

* Run ruff format

* Copy over strategies as async

* Add release note

…updates (#466)

Bumps the github-actions group with 2 updates in the / directory: [actions/checkout](https://github.com/actions/checkout) and [actions/setup-python](https://github.com/actions/setup-python).


Updates `actions/checkout` from 4.1.1 to 4.1.6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.1...v4.1.6)

Updates `actions/setup-python` from 5.0.0 to 5.1.0
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5.0.0...v5.1.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Co-authored-by: Julien Danjou <julien@danjou.info>

* Support Trio out-of-the-box

This PR makes `@retry` just work when running under Trio.

* Add a no-trio test environment

* Switch to only testing trio in one environment

* bump releasenote so it is later in history->reno puts it in the correct place in the changelog

* fix mypy & pep8 checks

* Update doc/source/index.rst

fix example

Co-authored-by: Julien Danjou <julien@danjou.info>

* Update tests/test_tornado.py

* Update tests/test_tornado.py

* make _portably_async_sleep a sync function that returns an async function

---------

Co-authored-by: Nathaniel J. Smith <njs@pobox.com>
Co-authored-by: Julien Danjou <julien@danjou.info>

Change-Id: Idc6ec012cceae67ceb11914763350b34addcce5e