* Make test_start_deprecated_super() more robust.
* Work around the FTPFilesStore.FTP_* initialization.
* Enable xdist on CI.
* Add PYTEST_ADDOPTS to tox passenv.
* Move no-reactor to pytest-asyncio.
* Unify the style.
* Skip a test that installs a reactor in no-reactor.
* Fix pinned env deps.
* Strict pytest-asyncio mode.
* Migrate to pytest-twisted (WIP)
* Some typing fixes.
* Make --reactor=asyncio the default again.
* Try installing the correct event loop policy in tests on Windows.
* Make reactor_pytest a normal fixture.
* Fix test warnings.
* Fix FTPDownloadHandler teardown.
* Cleanups, typing.
* More cleanup.
* Update only_asyncio/only_not_asyncio mark messages.