[Checkins] [zopefoundation/zope.schema] 2798cb: Add a python_requires to setup.py

[Marius Gedminas]

  Branch: refs/heads/add-python-requires
  Home:   https://github.com/zopefoundation/zope.schema
  Commit: 2798cb10f460e862b012743d465e1ce8aa036cf6
      https://github.com/zopefoundation/zope.schema/commit/2798cb10f460e862b012743d465e1ce8aa036cf6
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2020-04-06 (Mon, 06 Apr 2020)

  Changed paths:
    M setup.py

  Log Message:
  -----------
  Add a python_requires to setup.py

Fixes #93.