Try to weed out "Framework :: Pytest" false-positives

[nicoddemus]

It seems a lot of packages are using the Framework :: Pytest classifier even though they are not plugins, but only use pytest to test their own code. This generates a bunch of false positives that we should avoid showing.

[The-Compiler]

I've been thinking about this recently as well - but I'm not sure what we can do, other than a hand-written list of exceptions?

FWIW I've tried to track down some of the repos and submit a PR, but many of those don't seem to exist, so I only ended up with https://github.com/BotEX-Developers/botbase/pull/12.

[nicoddemus]

Yeah I'm not sure either, but a thought that occurred was:

For all packages that don't start with "pytest-" and declare Framework :: Pytest, look at the source tarball for sign of entry points (hand parsing setup.py, setup.cfg, etc).

Of course there are obvious drawbacks: false positives, manual parsing is tricky/might be flaky, etc., but in the end we might get better results than what we are having currently.

[nicoddemus]

Closed by #66.