[Checkins] [zopefoundation/zope.app.form] 19137a: Modernize Python versions.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.app.form
  Commit: 19137ad197c8f4ae422ee81e8777d66e7a0145de
      https://github.com/zopefoundation/zope.app.form/commit/19137ad197c8f4ae422ee81e8777d66e7a0145de
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-10-13 (Sun, 13 Oct 2019)

  Changed paths:
    M .travis.yml
    M CHANGES.rst
    M setup.py
    M tox.ini

  Log Message:
  -----------
  Modernize Python versions.

- drop support for Python 3.4.
- add support for Python 3.8.
- also bump version.

modified:   .travis.yml
modified:   CHANGES.rst
modified:   setup.py
modified:   tox.ini