[Checkins] [zopefoundation/zope.hookable] e81f6b: Bump major version

[Marius Gedminas]

  Branch: refs/heads/drop-py34
  Home:   https://github.com/zopefoundation/zope.hookable
  Commit: e81f6b108c44cbb7a566df795de80f098cd690cc
      https://github.com/zopefoundation/zope.hookable/commit/e81f6b108c44cbb7a566df795de80f098cd690cc
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-04-30 (Tue, 30 Apr 2019)

  Changed paths:
    M CHANGES.rst
    M setup.py

  Log Message:
  -----------
  Bump major version

Because we dropped support for Python 3.4 and some view that as a
backwards-incompatible change.