build: support Node.js 6.x

dougwilson · dougwilson · commit d1dd7e2d1efd · 2016-05-10T18:36:33.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ node_js:
   - "3.3"
   - "4.4"
   - "5.11"
+  - "6.1"
 sudo: false
 before_install:
   # Setup Node.js version-specific dependencies
