chore: set ci node version

PanJiaChen · PanJiaChen · commit 74da10ca29b0 · 2019-04-26T17:58:55.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
-node_js: stable
+node_js: 10
 script: npm run test
 notifications:
   email: false
