Fixed TravisCI configuration

Author: buffcode

.travis.yml

@@ -1,3 +1,4 @@
+sudo: false
 language: php
 php:
   - 5.3
@@ -8,5 +9,6 @@ php:
 
 before_script:
   - cd tests
+  - composer install -n
 
 script: phpunit --coverage-text --configuration phpunit.xml.dist