Updated .travis.yml;

Author: edgardmessias

.travis.yml

@@ -48,9 +48,9 @@ before_install:
 install:
   - echo "extension=pdo_firebird.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
   - travis_retry composer self-update && composer --version
-  - travis_retry composer global require "fxp/composer-asset-plugin:~1.0.0" --prefer-source --no-interaction
+  - travis_retry composer global require "fxp/composer-asset-plugin:~1.0.0" --prefer-dist --no-interaction
   - export PATH="$HOME/.composer/vendor/bin:$PATH"
-  - travis_retry composer install --prefer-source --no-interaction
+  - travis_retry composer install --prefer-dist --no-interaction
 
 before_script:
   # show some versions and env information