Add node 12, drop node 6

JamesMessinger · JamesMessinger · commit fdc8d45e018d · 2019-08-25T06:46:43.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,9 +7,9 @@ filter_secrets: false
 language: node_js
 
 node_js:
-  - 6
   - 8
   - 10
+  - 12
 
 os:
   - linux
