Fix CI issues

[jrbourbeau]

This PR is to try and fix pip-related CI build issues

Ref #381

[TomAugspurger]

Thanks for looking into this.

May need to remove the

filterwarnings =
    error:::sklearn[.*]

from our setup.cfg, at least temporarily.

[TomAugspurger]

What prompted this?

[jrbourbeau]

I came across https://stackoverflow.com/questions/52582563/pip-install-attributeerror-distinfodistribution-dep-map and conda-forge/testpath-feedstock#7 after a little bit of Google-ing

[jrbourbeau]

Definitely just a quick fix until a new release is out, but it seems to be working for the moment

[TomAugspurger]

Well, the 36 build is passing, thanks. For the 2.7 build, I would see if removing that filterwarnings fixes things.

I'd ignore the sklearn dev failures for now. I'll go through them when I have time. I suspect that the 0.20 release opened up some floodgates :)

[jrbourbeau]

The sklearn dev failure is due to DeprecationDict being removed in scikit-learn/scikit-learn#12241

[jrbourbeau]

I'd ignore the sklearn dev failures for now. I'll go through them when I have time.

Works for me! I've gotta step away to run some errands. I can work on the sklearn dev failure later on, but I'm okay with merging this PR in (if you approve of the changes of course :) )

[TomAugspurger]

Thanks for working on this.