language: php

php:
  - 5.4
  - 5.5
  - 5.6
  - 7.0
  - 7.1
  - 7.2

before_script:
  - composer install --no-progress --prefer-source

script:
  - vendor/bin/phpunit

language: php

php:
  - 7.3
  - 7.4

before_script:
  - composer install --no-progress --prefer-source

script:
  - vendor/bin/phpunit

Update Travis config to match upported PHP versionS.
Update Travis config to match upported PHP versionS.
