build(travis): change node version to 8 as semantic release need it

nurrony · nurrony · commit fa5cc1989cd6 · 2018-04-29T02:07:41.000+06:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,8 +7,6 @@ notifications:
   email: false
 node_js:
   - '8'
-  - '6'
-  - '4'
 after_success:
   - npm run travis-deploy-once "npm run semantic-release"
 branches:
