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

@@ -2,9 +2,10 @@
 rvm: 2.4.2
 gemfile:
   - Gemfile
   - test/gemfiles/activerecord51.gemfile
   - test/gemfiles/activerecord50.gemfile
+  - test/gemfiles/activerecord42.gemfile
 sudo: false
 before_install: gem install bundler
 script: bundle exec rake test
 notifications:
   email: