.travis.yml in stateful_enum-0.3.0 vs .travis.yml in stateful_enum-0.3.1

@@ -1,22 +1,33 @@
 language: ruby
 
+sudo: false
+
 cache:
+  - apt
   - bundler
 
 rvm:
-  - 2.2.4
-  - 2.3.0
+  - 2.2.5
+  - 2.3.1
   - ruby-head
 
+matrix:
+  exclude:
+    - rvm: ruby-head
+      gemfile: gemfiles/Gemfile-rails.4.1.x
+    - rvm: ruby-head
+      gemfile: gemfiles/Gemfile-rails.4.2.x
+
 gemfile:
   - gemfiles/Gemfile-rails.4.1.x
   - gemfiles/Gemfile-rails.4.2.x
-  - gemfiles/Gemfile-rails.5.0.0.beta3
+  - gemfiles/Gemfile-rails.5.0.0
 
-before_install:
- - sudo apt-get install graphviz
- - gem install bundler -v 1.11.2
+addons:
+  apt:
+    packages:
+      - graphviz
 
 matrix:
   allow_failures:
     - rvm: ruby-head