Update travis.yml to Node 6

sjsyrek · sjsyrek · commit 635b0704f1e7 · 2016-08-25T15:09:31.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,7 @@ cache:
 notifications:
   email: false
 node_js:
-  - '4'
+  - '6'
 before_install:
   - npm i -g npm@^2.0.0
 before_script:
