[xmlunit/xmlunit.net] e3a4ed: sync appveyor version number

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

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: e3a4ed1bd67be1f303ff3d74415c92afac69aa5e
      https://github.com/xmlunit/xmlunit.net/commit/e3a4ed1bd67be1f303ff3d74415c92afac69aa5e
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2016-06-02 (Thu, 02 Jun 2016)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  sync appveyor version number