Test with higher version of nodejs

.travis.yml

@@ -19,6 +19,7 @@ services:
   - memcached
   - redis
 before_install:
+  - nvm install 0.12.0
   - phpenv config-rm xdebug.ini
   - composer self-update --no-progress --no-interaction
   - sudo apt-get purge elasticsearch

circle.yml

@@ -8,6 +8,8 @@ general:
 machine:
   php:
     version: 5.5.21
+  node:
+    version: 0.12.0
   services:
     - memcached
     - redis