Stop testing node v4 on travis ci

SpaceK33z · SpaceK33z · commit cdd10fa4f757 · 2018-02-25T11:42:40.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,7 +9,6 @@ language:
 node_js:
   - '8'
   - '6'
-  - '4'
 
 script:
   npm run ci
