Update .travis.yml for latest Node.js engines

gregjacobs · gregjacobs · commit e473e9254f7d · 2017-11-06T21:33:21.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,5 @@ node_js:
   - "8.9"
   - "7.10.1"
   - "6.11.5"
-  - "5.12.0"
-  - "4.8.5"
 before_script:
   - npm install grunt-cli -g
