language: php

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

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

matrix:
  include:
    - php: 7.0
      env: 'COMPOSER_FLAGS="--prefer-stable --prefer-lowest"'

before_script:
  - travis_wait 20 travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-dist

script:
  - vendor/bin/phpcs --standard=psr2 src/
  - vendor/bin/phpunit