[Checkins] [zopefoundation/zope.index] 0b8c4e: Add Python 3.8

[Marius Gedminas]

  Branch: refs/heads/py38
  Home:   https://github.com/zopefoundation/zope.index
  Commit: 0b8c4e2de2ebffa3cb969d7b15bf7a5e7cb0ff4b
      https://github.com/zopefoundation/zope.index/commit/0b8c4e2de2ebffa3cb969d7b15bf7a5e7cb0ff4b
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-11-12 (Tue, 12 Nov 2019)

  Changed paths:
    M .manylinux-install.sh
    M .travis.yml
    M CHANGES.rst
    M appveyor.yml
    M setup.py
    M tox.ini

  Log Message:
  -----------
  Add Python 3.8