[Checkins] [zopefoundation/zope.interface] 1836a9: Run twine check before uploading wheels

[Marius Gedminas]

  Branch: refs/heads/fix-macos-maybe
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: 1836a9f28047e05788cb3c46a28a00de59135c72
      https://github.com/zopefoundation/zope.interface/commit/1836a9f28047e05788cb3c46a28a00de59135c72
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-11-11 (Mon, 11 Nov 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Run twine check before uploading wheels

This is mostly to debug twine installation on Mac OS images.