Remove --prefer-source from composer install command

jsor · jsor · commit f942da7b505d · 2016-03-31T15:10:33.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -12,7 +12,7 @@ before_install:
   - composer self-update
 
 install:
-  - composer install --prefer-source
+  - composer install
 
 script:
   - phpunit -v --coverage-text
