.travis.yml in freno-client-0.3.0 vs .travis.yml in freno-client-0.4.0

@@ -1,5 +1,16 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.1
+  - 2.1
+  - 2.2
+  - 2.3
+  - 2.4
+  - ruby-head
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+  fast_finish: true
 before_install: gem install bundler -v 1.14.6
+script:
+  - bundle exec script/cibuild
+  - bundle exec script/cibuild-lint