Try to fix Travis.

simensen · simensen · commit 1dc16691454a · 2013-12-11T17:37:19.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,6 +7,6 @@ php:
   - 5.5
 
 before_script:
-  - composer install --dev
+  - composer install --prefer-source
 
 script: phpunit --coverage-text --verbose
