build: remove node6 build

unional · unional · commit 96af167df297 · 2019-05-13T03:34:52.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,9 +8,7 @@ notifications:
 node_js:
   - '11'
   - '10'
-  # - '9'
   - '8'
-  - '6'
 branches:
   only:
     - master
