fix(cli): Drop node v4 support

KhaledMohamedP · web-flow · commit ec36c428c29a · 2019-10-30T17:22:27.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,7 +8,6 @@ node_js:
   - '10'
   - '8'
   - '6'
-  - '4'
 before_script:
   - npm prune
 script:
