Remove node 9

Lars-Magnus Skog · Lars-Magnus Skog · commit 9a83c55c6800 · 2018-07-12T13:30:46.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,5 +3,4 @@ language: node_js
 node_js:
   - 6
   - 8
-  - 9
   - 10

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