Drop support for Python 3.4.

Its test cannot be run any more because `zope.testrunner` no longer supports
Python 3.4

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 python:
     - 2.7
-    - 3.4
     - 3.5
     - 3.6
     - pypy

CHANGES.rst

@@ -2,9 +2,11 @@
  Changes
 =========
 
-4.4 (unreleased)
+5.0 (unreleased)
 ================
 
+- Drop support for Python 3.4.
+
 - Fix test failures and deprecation warnings occurring when using Python 3.8a1.
   (`#15 <https://github.com/zopefoundation/zope.tales/pull/15>`_)
 

setup.py

@@ -32,7 +32,7 @@ def read(*rnames):
 ]
 
 setup(name='zope.tales',
-      version='4.4.dev0',
+      version='5.0.dev0',
       author='Zope Foundation and Contributors',
       author_email='zope-dev@zope.org',
       description='Zope Template Application Language Expression Syntax '
@@ -52,7 +52,6 @@ def read(*rnames):
           'Programming Language :: Python :: 2',
           'Programming Language :: Python :: 2.7',
           'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.4',
           'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
@@ -68,6 +67,7 @@ def read(*rnames):
       packages=find_packages('src'),
       package_dir={'': 'src'},
       namespace_packages=['zope'],
+      python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*',
       extras_require={
           'test': TESTS_REQUIRE,
           'tal': [

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py27,py34,py35,py36,py37,py38,pypy,pypy3,coverage,docs
+    py27,py35,py36,py37,py38,pypy,pypy3,coverage,docs
 
 [testenv]
 commands =