Update .travis.yml

cheton · cheton · commit de9823b2bee0 · 2017-11-03T18:40:30.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,8 +9,6 @@ os:
 
 node_js:
   - '6'
-  - '5'
-  - '4'
 
 before_install:
   - npm install -g npm
