Remove node 9

Lars-Magnus Skog · Lars-Magnus Skog · commit 29fdaf4c7f8f · 2018-07-12T13:28:43.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,5 +5,4 @@ language: node_js
 node_js:
   - 6
   - 8
-  - 9
   - 10

-Original file line number
+Diff line change
 node_js:
   - 6
   - 8
 -  - 9
   - 10