[Checkins] [zopefoundation/BTrees] 4e46cd: twine upload --skip-existing

[GitHub]

  Branch: refs/heads/cleaner-releases
  Home:   https://github.com/zopefoundation/BTrees
  Commit: 4e46cd2339014daf338335d0fc77d6f4979416ca
      https://github.com/zopefoundation/BTrees/commit/4e46cd2339014daf338335d0fc77d6f4979416ca
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2018-08-10 (Fri, 10 Aug 2018)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  twine upload --skip-existing

This way if the sdist hasn't been uploaded yet for some reason, Appveyor
will take care of it.



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