Remove node_js v9 as node gets the latest version

gpahal · gpahal · commit 969d5ea09918 · 2017-12-13T11:01:15.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,6 @@
 language: node_js
 node_js:
   - "node"
-  - "9"
   - "8"
   - "6"
 sudo: required
