Update to node 10 in .travis.yml

greenkeeper[bot] · greenkeeper[bot] · commit ae871f7ec824 · 2018-05-07T15:09:28.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,7 @@ dist: trusty
 language: node_js
 node_js:
   - "8.6"
+  - "10"
 env:
   - CC=gcc-4.9 && CXX=g++-4.9
 script:
