build: support Node.js 9.x

dougwilson · dougwilson · commit a37f22dec076 · 2017-11-25T00:01:23.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -12,6 +12,7 @@ node_js:
   - "6.12"
   - "7.10"
   - "8.9"
+  - "9.2"
 sudo: false
 dist: precise
 cache:
