.travis.yml in bindata-2.1.0 vs .travis.yml in bindata-2.2.0

@@ -1,7 +1,12 @@
 language: ruby
 rvm:
-  - 1.9.3
   - 2.0.0
-  - 2.1.1
+  - 2.1.8
+  - 2.2.4
+  - 2.3.0
   - jruby
   - ruby-head
+
+matrix:
+  allow_failures:
+    - rvm: ruby-head