build(ci): drop node 9 support

ArrayZoneYour · ArrayZoneYour · commit 328295d46f46 · 2021-03-05T12:55:12.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,10 +1,10 @@
 language: node_js
 node_js:
-  - '9'
   - '10'
   - '11'
   - '12'
   - '13'
+  - '14'
 
 before_script:
   - npm install react@latest react-dom@latest
