.travis.yml in vue_cli-rails-0.1.4 vs .travis.yml in vue_cli-rails-0.1.6

@@ -1,7 +1,20 @@
 ---
 sudo: false
 language: ruby
 cache: bundler
 rvm:
+  - 2.3.8
   - 2.4.5
+  - 2.5.2
+  - 2.6.1
+env:
+  - RAILS_VERSION=4 NODE_VERSION=8
+  - RAILS_VERSION=4 NODE_VERSION=lts
+  - RAILS_VERSION=5 NODE_VERSION=lts
+  - RAILS_VERSION=5 NODE_VERSION=latest
+matrix:
+  fast_finish: true
+  include:
+    - rvm: ruby-head
+      env: RAILS_VERSION=beta NODE_VERSION=latest
 before_install: gem install bundler -v 1.17.3