.travis.yml in progress_bar-1.0.5 vs .travis.yml in progress_bar-1.1.0

@@ -1,16 +1,12 @@
 script: rake spec
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.2
+  - 2.2
+  - 2.3
+  - 2.4.0-preview3
   - ruby-head
-  - jruby-19mode
-  - jruby-head
-  - rbx-2
 
 matrix:
   allow_failures:
     - rvm:
-      - rbx-2.1.1
-      - jruby-head
+      - 2.4.0-preview3
       - ruby-head