[Checkins] [zopefoundation/Zope] 11fe78: Fix appveyor.yml

[Steffen Allner]

  Branch: refs/heads/re-345-appveyor
  Home:   https://github.com/zopefoundation/Zope
  Commit: 11fe78d0112a2cc73ab69ffa04002c7c62fee434
      https://github.com/zopefoundation/Zope/commit/11fe78d0112a2cc73ab69ffa04002c7c62fee434
  Author: Steffen Allner <sa at gocept.com>
  Date:   2019-05-10 (Fri, 10 May 2019)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  Fix appveyor.yml