.travis.yml in signore-0.4.2 vs .travis.yml in signore-0.5.0

@@ -1,6 +1,12 @@
+cache: bundler
+fast_finish: true
 language: ruby
+matrix:
+  allow_failures:
+    - rvm: ruby-head
 rvm:
   - ruby-2.1
   - ruby-2.2
+  - ruby-2.3.0
   - ruby-head
 sudo: false