.travis.yml in gelf-1.4.0 vs .travis.yml in gelf-2.0.0

@@ -1,9 +1,12 @@
 rvm:
   - 1.8.7
   - ree
   - 1.9.2
   - 1.9.3
-  - jruby
+  - 2.0.0
+  - 2.1.0
+  - 2.2.0
+  - jruby-19mode
 
 notifications:
   irc: "irc.freenode.org#graylog2"