[Checkins] [zopefoundation/AccessControl] 7553e5: - more Travis fixing

[Jens Vagelpohl]

  Branch: refs/heads/py39
  Home:   https://github.com/zopefoundation/AccessControl
  Commit: 7553e5605f949f87d1b7306418df39cb67eb27cc
      https://github.com/zopefoundation/AccessControl/commit/7553e5605f949f87d1b7306418df39cb67eb27cc
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2020-04-24 (Fri, 24 Apr 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  - more Travis fixing