Add node v9 to test matrix

leebyron · leebyron · commit edfeaee7d5ad · 2018-01-18T16:49:35.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ language: node_js
 
 # https://github.com/nodejs/LTS
 node_js:
+  - '9'
   - '8'
   - '6'
   - '4'
