.travis.yml in postgres_upsert-4.0.0 vs .travis.yml in postgres_upsert-5.0.0

@@ -1,9 +1,5 @@
 language: ruby
 rvm:
   - 2.1.0
-  - jruby-18mode
-  - jruby-19mode
   - rbx-2
   - ruby-head
-  - jruby-head
-  - ree