chore(travis): build on Node.js 8 not 9 (current latest)

coderbyheart · web-flow · commit b52727909936 · 2017-11-05T15:45:27.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,7 @@ cache:
   - node_modules
 notifications:
   email: false
-node_js: node
+node_js: '8'
 before_install:
 - npm i -g npm5@latest
 script:
