remove oldest version of node from travis testing since it fails; it's reasonable to ask for modern software stacks

yochannah · yochannah · commit b238759b467f · 2018-12-14T15:45:45.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,4 +4,3 @@ node_js:
   - v10
   - v8
   - v6
-  - v4

-Original file line number
+Diff line change
   - v10
   - v8
   - v6
 -  - v4