.travis.yml in progress-3.1.0 vs .travis.yml in progress-3.1.1

- old
+ new

@@ -1,11 +1,15 @@
+sudo: false
 language: ruby
+before_install:
+  - gem update bundler
 rvm:
-  - 1.8.7
-  - 1.9.2
-  - 1.9.3
+  - '1.8'
+  - '1.9'
   - '2.0'
   - '2.1'
+  - '2.2'
+  - '2.3.0'
   - jruby-18mode
   - jruby-19mode
   - ree
 script:
   if [ -z "$RUBOCOP" ]; then