.travis.yml in typogen-0.1.1 vs .travis.yml in typogen-0.2.0

@@ -1,6 +1,8 @@
 sudo: false
 language: ruby
 rvm:
+  - 2.0
+  - 2.1
   - 2.2
   - 2.3.3
 before_install: gem install bundler -v 1.14.3