.travis.yml in dumb_down_viewer-0.1.0 vs .travis.yml in dumb_down_viewer-0.1.1

@@ -1,5 +1,6 @@
 sudo: false
 language: ruby
 rvm:
+  - 2.1
   - 2.2.4
 before_install: gem install bundler -v 1.13.2