dist: focal
language: python
python:
  - '3.6'

cache: pip

install:
  - pip install -e .
  - pip install -r requirements-dev.txt

script: pytest

dist: focal
language: python
python:
  - '3.6'
  - '3.7'
  - '3.8'
  - '3.9'

cache: pip

install:
  - pip install -e .
  - pip install -r requirements-dev.txt

script: pytest

Add Python versions 3.7-3.9 to Travis CI build matrix
Add Python versions 3.7-3.9 to Travis CI build matrix
