Build: add node 11 (#400)

aladdin-add · kaicataldo · commit 4b86a7dc7c44 · 2018-11-07T14:15:56.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,5 +6,6 @@ node_js:
     - 8
     - 9
     - 10
+    - 11
 after_success:
     - npm run coveralls
