Travis CI: Add Python 3.7 to the testing
Also Travis CI is deprecating the keyword 'sudo'
language: python
-sudo: required
-dist: trusty
python:
- '2.7'
- '3.4'
- '3.5'
- '3.6'
+matrix:
+ include:
+ - python: '3.7'
+ dist: xenial # required for Python >= 3.7 (travis-ci/travis-ci#9069)
cache: pip
before_install:
- '[ "${TRAVIS_PULL_REQUEST}" = "false" ] && openssl aes-256-cbc -K $encrypted_cebf25e6c525_key
