Fixes#2223.
Unfortunately, eventlet doesn't implement GreenSocket.sendfile, so we have to do it for it.
Add gevent and eventlet to tox.ini and add tests to make sure we can at least import the workers. Some tests that this actually functions would be nice...
Update the gevent and eventlet setup extras to require the versions that are enforced in their worker modules.
- run lint using latest Python 3.7
- updated env list in tox.ini
- added py38-dev
- removed py36-dev
- moved aiohttp to requirements_test.txt
Signed-off-by: Brett Randall <javabrett@gmail.com>
This way we can avoid code duplication.
Also, this change makes tests faster due to ignoring the sdist step
and adds Python 3.2, 3.4 and PyPy 3 to build matrix.