ci: update Node targets

jlengstorf · jlengstorf · commit b9d351bd483b · 2017-12-19T11:20:11.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,9 +4,9 @@ cache:
   directories:
   - node_modules
 node_js:
-- "6"
-- "7"
-- "8"
+- 6
+- 8
+- 9
 notifications:
   email: false
 before_script:
