Update Node versions in Travis 🏗

pirelenito · pirelenito · commit 1d11e4a7d05c · 2018-04-22T10:32:33.000+02:00
Webpack 4 no longer supports Node 4
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 node_js:
-  - "4"
-  - "5"
+  - "8"
+  - "9"
 # send builds to the container-based infrastructure
 sudo: false
 deploy:
