Merge pull request #126 from azmeuk/py38

Added official python 3.8 support, dropped python 3.4 support.
Thanks Éloi Rivard (@azmeuk) !

.travis.yml

@@ -1,30 +1,15 @@
 language: python
 
 python:
-  - "3.6"
+  - 2.7
-
+  - 3.5
-# Enable 3.7 without globally enabling sudo and dist: xenial for other build jobs
+  - 3.6
-matrix:
+  - 3.7
-  include:
+  - 3.8
-    - name: "Python: 3.7"
-      python: "3.7"
-      dist: xenial
-      sudo: true
-      env: TOX_ENV=py37
-
-env:
-  - TOX_ENV=py27
-  - TOX_ENV=py34
-# - TOX_ENV=py35
-  - TOX_ENV=py36
-
-before_install:
-  # work around https://github.com/travis-ci/travis-ci/issues/8363
-  - pyenv global system $TRAVIS_PYTHON_VERSION
 
 install:
-  - travis_retry pip install -U pip wheel tox
+  - travis_retry pip install -U pip wheel tox-travis
   - travis_retry pip install -U -r requirements.txt -e ".[test]"
 
 script:
-  - tox -e $TOX_ENV
+  - tox

setup.py

@@ -73,9 +73,9 @@ setup(
         "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",
     ],
 )

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py35, py36, py37, doc
+envlist = py27, py35, py36, py37, py38, doc
 
 [testenv]
 deps =