language: php

php:
  - 5.4
  - 5.5
  - 5.6
  - 7.0
  - hhvm

matrix:
  allow_failures:
    - php: hhvm

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

script:
  - phpunit

language: php

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

matrix:
  allow_failures:
    - php: hhvm

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

script:
  - phpunit

Add PHP 7.1 to Travis CI config.
Add PHP 7.1 to Travis CI config.