🔧 use Node.js 8.10.0 instead of 8.0 for test.

Author: kayo5994

.travis.yml

@@ -3,7 +3,7 @@ cache:
   directories:
     - node_modules
 node_js:
-  - "8.0"
+  - "8.10.0"
   - "stable"
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.15.2