Update travis node engine

dweber019 · dweber019 · commit 10a3a6eb72b9 · 2018-02-15T22:18:27.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "6.9.1"
+  - "8.9.4"
 install:
   - yarn install
 script:
