Update travis node version (immutable-js#1528)

leebyron · web-flow · commit e6636f57a158 · 2018-05-17T14:06:37.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 sudo: false
 language: node_js
-node_js: 7
+node_js: 8
 
 cache: yarn
 script: npm run test:travis
