[travis] remove nodejs 6 test

ar2rsawseen · ar2rsawseen · commit 4bc86237dd0e · 2019-01-03T12:16:07.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-- '6'
 - '8'
 - '10'
 sudo: false
