try setting exact node version in travis configuration

catarak · catarak · commit 4905a827852d · 2018-05-24T18:55:53.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,3 @@
 language: node_js
 node_js:
- - "8"
+ - "8.11.1"
