drop support of node 4

bertho-zero · bertho-zero · commit e05b81f41878 · 2017-09-22T00:15:35.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,8 +3,6 @@ dist: trusty
 language: node_js
 
 node_js:
-  - "4"
-  - "5"
   - "6"
   - "stable"
 
