fix(.travis.yml): update node version

pine · web-flow · commit 806798042885 · 2018-07-23T23:02:48.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@ language: node_js
 node_js:
   - 6
   - 8
-  - stable
+  - 10
 
 script:
   - travis_retry npm test
