Always test with the latest stable Node version on Travis (facebook#5546)

Noel Yoo · iansu · commit 1164f6bc3011 · 2018-11-22T17:57:09.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,7 @@ language: node_js
 node_js:
   - 8
   - 10
+  - node
 cache:
   yarn: true
   directories:
