update travis too

.travis.yml

@@ -3,9 +3,9 @@ language: php
 php:
 # Here is where we can list the versions of PHP you want to test against
 # using major version aliases
-  - 5.3
   - 5.4
   - 5.5
+  - 5.6
 
 # optionally specify a list of environments, for example to test different RDBMS
 env:
@@ -51,4 +51,4 @@ after_failure:
 # configure notifications (email, IRC, campfire etc)
 #notifications:
 #  irc: "irc.freenode.org#shimmie"
-#
+#