Update .travis.yml to test modern NodeJS versions

MasterOdin · web-flow · commit 058963976016 · 2018-08-08T11:11:10.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,10 @@
 language: node_js
+dist: trusty
+sudo: true
+node_js:
+  - '8'
+  - '9'
+  - '10'
 addons:
   firefox: latest
 before_script:
