Automatic deploy is not uploading wheels

[nicoddemus]

I just implemented the same technique used in pytest-xdist to publish pytest-qt and noticed that it did not upload wheels as expected.

Looking at the deployment output from the build triggered by the tag I noticed this right sdist has been uploaded:

running upload_docs
creating build
creating build/docs
error: no files found in upload directory 'build/docs'

(I see the same on pytest-qt).

This is a known issue (travis-ci/dpl#334) with Travis deployment on PyPI and there's even travis-ci/dpl#349 with a fix, but that PR seems somewhat abandoned.