Modernize Python versions.

- drop support for Python 3.4.
- add support for Python 3.8.

modified:   .travis.yml
modified:   CHANGES.rst
modified:   setup.py
modified:   tox.ini

.travis.yml

@@ -1,17 +1,12 @@
 language: python
-sudo: false
 python:
     - 2.7
-    - 3.4
     - 3.5
     - 3.6
+    - 3.7
+    - 3.8
     - pypy
     - pypy3
-matrix:
-    include:
-        - python: "3.7"
-          dist: xenial
-          sudo: true
 install:
     - pip install -U pip setuptools
     - pip install -U coverage coveralls

CHANGES.rst

@@ -5,7 +5,9 @@ CHANGES
 2.2 (unreleased)
 ================
 
-- Nothing changed yet.
+- Add support for Python 3.8.
+
+- Drop support for Python 3.4.
 
 
 2.1 (2018-11-12)

setup.py

@@ -36,10 +36,10 @@ def read(*path_elements):
         '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',
+        'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Natural Language :: English',

tox.ini

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