Update to current Python versions.

Additionally we have to pin an older `Sphinx` version to keep supporting
Python 2.

.travis.yml

@@ -1,22 +1,22 @@
 language: python
-sudo: false
+dist: xenial
 matrix:
   include:
     - python: 2.7
-    - python: 3.4
     - python: 3.5
     - python: 3.6
     - python: 3.7
-      dist: xenial
-      sudo: true
-    - python: pypy
-    - python: pypy3
+    - python: 3.8-dev
+    - python: pypy2.7-6.0
+    - python: pypy3.5-6.0
     - python: 2.7
       env:
           - PURE_PYTHON=1
           - ZOPE_WATCH_CHECKERS=1
-    - python: 3.4
+    - python: 3.7
       env: ZOPE_WATCH_CHECKERS=1
+    - python: 3.7
+      env: PURE_PYTHON=1
 install:
     - pip install -U pip setuptools
     - pip install -U coveralls coverage

CHANGES.rst

@@ -2,10 +2,12 @@
  Changes
 =========
 
-4.3.2 (unreleased)
-==================
+5.0 (unreleased)
+================
+
+- Drop support for Python 3.4.
 
-- Nothing changed yet.
+- Add support for Python 3.8a3.
 
 
 4.3.1 (2019-01-03)

setup.py

@@ -132,7 +132,7 @@ def __str__(self):
 
 
 setup(name='zope.security',
-      version='4.3.2.dev0',
+      version='5.0.dev0',
       author='Zope Foundation and Contributors',
       author_email='zope-dev@zope.org',
       description='Zope Security Framework',
@@ -172,6 +172,7 @@ def __str__(self):
           'build_ext': optional_build_ext,
       },
       features=features,
+      python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*',
       install_requires=[
           'setuptools',
           'zope.component',
@@ -195,7 +196,7 @@ def __str__(self):
           ],
           'test': TESTS_REQUIRE,
           'docs': [
-              'Sphinx',
+              'Sphinx < 2',  # Version 2.0+ only supports Python 3.5+
               'repoze.sphinx.autointerface',
           ],
       },

tox.ini

@@ -3,7 +3,7 @@ envlist =
 # Jython support pending 2.7 support, due 2012-07-15 or so.  See:
 # http://fwierzbicki.blogspot.com/2012/03/adconion-to-fund-jython-27.html
 #   py27,pypy,jython,py33,coverage,docs
-    py27,py27-watch,pypy,pypy3,py34-watch,py34,py35,py36,py37,coverage,docs
+    py27,py27-watch,pypy,pypy3,py35,py36,py37-watch,py37-pure,py37,py38,coverage,docs
 
 [testenv]
 commands =
@@ -20,13 +20,20 @@ setenv =
     ZOPE_WATCH_CHECKERS = 1
     PIP_CACHE_DIR = {envdir}/.cache
 
-[testenv:py34-watch]
+[testenv:py37-watch]
 basepython =
-    python3.4
+    python3.7
 setenv =
     ZOPE_WATCH_CHECKERS = 1
     PIP_CACHE_DIR = {envdir}/.cache
 
+[testenv:py37-pure]
+basepython =
+    python3.7
+setenv =
+    PURE_PYTHON = 1
+    PIP_CACHE_DIR = {envdir}/.cache
+
 [testenv:coverage]
 usedevelop = true
 basepython =
@@ -41,7 +48,7 @@ deps =
 
 [testenv:docs]
 basepython =
-    python3.4
+    python3.7
 commands =
     sphinx-build -b html -d docs/_build/doctrees docs docs/_build/html
     sphinx-build -b doctest -d docs/_build/doctrees docs docs/_build/doctest