[Checkins] [zopefoundation/zope.sqlalchemy] 6a5321: Install in a Python 3.9 compatible way.

[Michael Howitz]

  Branch: refs/heads/py39
  Home:   https://github.com/zopefoundation/zope.sqlalchemy
  Commit: 6a532168cfc5334963edb8bb925306b93b489d00
      https://github.com/zopefoundation/zope.sqlalchemy/commit/6a532168cfc5334963edb8bb925306b93b489d00
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-02-17 (Mon, 17 Feb 2020)

  Changed paths:
    M .travis.yml
    R bootstrap.py

  Log Message:
  -----------
  Install in a Python 3.9 compatible way.