.travis.yml in backticks-1.0.0rc1 vs .travis.yml in backticks-1.0.0rc2

@@ -1,7 +1,8 @@
 sudo: false
 language: ruby
 rvm:
-- 1.9
+- 2.0
+- 2.1
 - 2.2
 before_install: gem install bundler -v '~> 1.10'
 script: bundle exec rake spec