language: php

php:
    - 5.6
    - 7.0
    - 7.1
    - 7.2
    - 7.3
    - 7.4

## Cache composer
cache:
  directories:
    - $HOME/.composer/cache

before_script:
  - travis_retry composer self-update
  - travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-dist

script:
  - make ci