dist: xenial
language: python
python:
  - "3.6"
env:
  - TOXENV=flake8
  - TOXENV=format
  - TOXENV=mypy
  - TOXENV=py36
before_install:
  - python --version
install:
  - pip install tox
script:
  - travis_wait 60 tox

dist: xenial
language: python
python:
  - "3.7"
env:
  - TOXENV=flake8
  - TOXENV=format
  - TOXENV=mypy
  - TOXENV=py37
before_install:
  - python --version
install:
  - pip install tox
script:
  - travis_wait 60 tox

Test under Python 3.7, drop 3.6
ci: Test under Python 3.7, drop 3.6
