.travis.yml in hako-0.1.0 vs .travis.yml in hako-0.2.0

@@ -1,4 +1,11 @@
 language: ruby
+sudo: false
 rvm:
-  - 2.2.3
-before_install: gem install bundler -v 1.10.6
+  - 2.1
+  - 2.2
+  - ruby-head
+before_install:
+  - gem install bundler
+matrix:
+  allow_failures:
+    - rvm: ruby-head