Update to node 10 in .travis.yml

greenkeeper[bot] · greenkeeper[bot] · commit 0b436cd67853 · 2018-04-27T11:47:31.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ notifications:
     on_failure: change
 node_js:
   - '9'
+  - '10'
 before_install:
   - npm i -g npm@^2.0.0
 install:
