.travis.yml in tee_logger-3.2.0 vs .travis.yml in tee_logger-3.2.1

@@ -1,7 +1,8 @@
 language: ruby
 cache: bundler
 rvm:
+  - 2.3.0
   - 2.2.3
   - 2.1.7
   - 2.0.0
 before_install: gem install bundler -v 1.10.4
 notifications: