chore: update travis

Tidyzq · Tidyzq · commit bf035b3282ee · 2020-07-13T15:29:30.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,6 @@
 language: node_js
 node_js:
-  - "lts/*"
+  - "v12.16.3"
 script: npm run test
-before_script:
-  - npm install
 after_script:
   - npm run codecov
