[Ddclient-support] [ddclient/ddclient] df2d9d: Add centos

[Sandro <no...@gi...>]

  Branch: refs/heads/ci-centos
  Home:   https://github.com/ddclient/ddclient
  Commit: df2d9dbd884e17e0aaa53003f50c9eb987b7ffc9
      https://github.com/ddclient/ddclient/commit/df2d9dbd884e17e0aaa53003f50c9eb987b7ffc9
  Author: Sandro Jäckel <san...@gm...>
  Date:   2020-06-30 (Tue, 30 Jun 2020)

  Changed paths:
    M .github/workflows/ci.yml

  Log Message:
  -----------
  Add centos