.travis.yml in tty-table-0.4.0 vs .travis.yml in tty-table-0.5.0

@@ -1,13 +1,17 @@
+---
 language: ruby
+sudo: false
+cache: bundler
 bundler_args: --without yard benchmarks
 script: "bundle exec rake ci"
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.0
-  - 2.2.0
+  - 2.1
+  - 2.2
+  - 2.3.0
   - ruby-head
 matrix:
   include:
     - rvm: jruby-19mode
     - rvm: jruby-20mode
@@ -18,5 +22,7 @@
     - rvm: ruby-head
     - rvm: jruby-head
   fast_finish: true
 branches:
   only: master
+notifications:
+  email: false