[Checkins] [zopefoundation/Persistence] 078b91: Drop support for Python 2.7 and PyPy2.

[Michael Howitz]

  Branch: refs/heads/drop-py2
  Home:   https://github.com/zopefoundation/Persistence
  Commit: 078b911c5c3a8625093ba3648000ee4163677cdb
      https://github.com/zopefoundation/Persistence/commit/078b911c5c3a8625093ba3648000ee4163677cdb
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-20 (Fri, 20 Mar 2020)

  Changed paths:
    M .travis.yml
    M CHANGES.rst
    M appveyor.yml
    R bootstrap.py
    M setup.py
    M src/Persistence/_Persistence.c
    M src/Persistence/mapping.py
    M tox.ini

  Log Message:
  -----------
  Drop support for Python 2.7 and PyPy2.