Remove test deps from „install_requires”

[ionelmc]

One thing that annoys me a lil bit is that install_requires has various deps that are only needed for testing.

Perhaps clize could move them to tests_require or install them specifically just for CI? What are your thoughts on this?

[epsy]

It's a good idea.

It doesn't look like tox installs the 'test_requires' dependencies. There doesn't seem to be an imminent fix for this: tox-dev/tox#13

Given that it seems some downstream CIs prefer to use setuptools' test command (e.g. 1 -> 2) it seems preferable to have both test_requires and tox dependencies.