update travis file

Faleij · Faleij · commit 98c61813d205 · 2018-06-13T09:14:28.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,8 @@
 language: node_js
 node_js:
-- '4'
-- '5'
+- '6'
+- '8'
+- '10'
 sudo: false
 script:
   - "npm run coverage"
