4 - PREFER_LOWEST="--prefer-lowest"
20 - composer dump-autoload
21 - composer self-update
22 - composer update --prefer-source $PREFER_LOWEST
27 # Use Travis' new container-based infrastructure.
28 # See http://docs.travis-ci.com/user/migrating-from-legacy/#How-can-I-use-container-based-infrastructure%3F