This division was just complicating things unnecessarily.
Also adopt pip-tools instead of doing it all by hand.
No pinned versions have been changed in this commit.
The breaking changes begun by the deprecation warnings in 3.10 have
arrived, but according to https://github.com/python/cpython/issues/93453
the scope has changed somewhat (for the better, I think). Don't test
on 3.12 until we've adapted to the new plan.
The main reason to drop this version before it reaches its EOL is so
that we can begin to use unittest.IsolatedAsyncioTestCase to replace
deprecated portions of the tornado.testing module.
A secondary reason is that Python 3.8 introduced support for the
samesite cookie attribute, which allows us to deprecate the
xsrf_token mechanism.
This will produce cross-version wheels so we won't have to do
releases just to make new wheels when new versions of Python
are available.
Also modernize the build process a bit to require setuptools and use
the native "optional" flag for extensions.
Now that compatibility between tornado and twisted is based on
asyncio, this test isn't very useful any more. It is broken by the
deprecations introduced in Python 3.10 and isn't worth reviving.
Our previous CI on Travis has been broken for a while due to their
move from travis-ci.org to travis-ci.com. Instead of fixing things up
there, move everything to github actions.
Ben Darnell