.travis.yml in hash_ext-0.2.3 vs .travis.yml in hash_ext-0.3.0

@@ -1,10 +1,23 @@
 language: ruby
+
 rvm:
   - 1.9.3
   - 2.0
   - 2.1
   - 2.2
   - 2.3.0
-  - jruby
+  - 2.4.0
+  - 2.5.0
+  - jruby-1.7.25
+  - jruby-9.1.7.0
+  - ruby-head
+  - jruby-head
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-head
+
 before_install:
   - gem install bundler
\ No newline at end of file