removed node 6 from ci

Author: matortheeternal

.travis.yml

@@ -1,7 +1,6 @@
 language: node_js
 
 node_js:
- - "6"
  - "8"
  - "9"
  - "10"
@@ -10,4 +9,4 @@ script:
 - npm run test
 
 after_success:
-- ./node_modules/.bin/codecov
+- ./node_modules/.bin/codecov