Oh, right. Silly me. Composer doesn't work in PHP 5.2.

ramsey · ramsey · commit f8e52eb28e67 · 2015-03-20T17:07:39.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.2
   - 5.3
   - 5.4
   - 5.5

-Original file line number
+Diff line change
@@ @@ -1,7 +1,6 @@ @@
 language: php
 php:
 -  - 5.2
   - 5.3
   - 5.4
   - 5.5