chore(travis): remove outdated node 6 version from running tests

cojack · cojack · commit 72e97c5f3785 · 2018-10-21T17:34:29.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,6 @@ language: node_js
 node_js:
   - stable
   - 8
-  - 6
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)
