[Checkins] [zopefoundation/Products.StandardCacheManagers] 79327f: Clean up Python requirements

[Jens Vagelpohl]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Products.StandardCacheManagers
  Commit: 79327fab7f703911f40631b6365d8cc61148b65c
      https://github.com/zopefoundation/Products.StandardCacheManagers/commit/79327fab7f703911f40631b6365d8cc61148b65c
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2019-02-17 (Sun, 17 Feb 2019)

  Changed paths:
    M .gitignore
    M .travis.yml
    M CHANGES.rst
    M setup.py
    M src/Products/StandardCacheManagers/AcceleratedHTTPCacheManager.py
    M src/Products/StandardCacheManagers/RAMCacheManager.py
    M src/Products/StandardCacheManagers/tests/test_AcceleratedHTTPCacheManager.py
    M tox.ini

  Log Message:
  -----------
  Clean up Python requirements

- Specify supported Python versions using ``python_requires`` in setup.py
- Added support for Python 3.7 and 3.8
- Dropped support for Python 3.4 as Zope does not support it anymore