.travis.yml in vagrant-vyos-1.1.0 vs .travis.yml in vagrant-vyos-1.1.1

@@ -1,9 +1,15 @@
 language: ruby
+sudo: false
+cache: bundler
 before_install:
   - rvm @global do gem uninstall bundler --all --executables
   - gem uninstall bundler --all --executables
-  - gem install bundler -v '< 1.7.0'
-script: bundle exec rake build
+  - gem install bundler -v '1.12.5'
 rvm:
-- 2.1.5
-- 2.0.0
+  - 2.2.5
+env:
+  global:
+    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+script:
+  - bundle exec rake
+  - bundle exec rake build