.travis.yml in attestor-1.0.0 vs .travis.yml in attestor-2.0.0

@@ -4,7 +4,6 @@
 script: rake test:coverage:run
 rvm:
   - '2.0'
   - ruby-head
   - rbx-2 --2.0
-  - jruby-head-20mode
-  - jruby-head-21mode
+  - jruby-9.0.0.0.pre1