Update to node 10 in .travis.yml

greenkeeper[bot] · greenkeeper[bot] · commit 0e2a8065d0b5 · 2018-04-26T12:48:42.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -12,6 +12,7 @@ addons:
 language: node_js
 node_js:
   - "6"
+  - "10"
 
 before_script:
   - export DISPLAY=:99.0
