Run CI for node 8 instead of no longer active 7.

paparomeo · paparomeo · commit afb64f9d7f4a · 2017-09-19T23:35:32.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,7 @@ language: node_js
 node_js:
   - 4
   - 6
-  - 7
+  - 8
 script: npm run ci
 notifications:
   email: false
