Dropped node v4 from the Travis tests

Erin Doyle · Erin Doyle · commit be9b7b6865eb · 2018-11-03T07:35:18.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,7 +5,6 @@ node_js:
   - "8"
   - "7"
   - "6"
-  - "4"
 
 before_script:
   - export DISPLAY=:99.0
