Update Python 3 versions for Travis
@@ -29,8 +29,8 @@ matrix:
# dist: xenial
# - python: pypy
# - env: {TOX_ENV: pypy-test}
- - python: 3.4
- env: {TOX_ENV: py34-flake8}
+ - python: 3.6
+ env: {TOX_ENV: py36-flake8}
- python: 2.7.13
env: {TOX_ENV: docs}
# Non-Python dependencies.
