.travis.yml in ahoy_email-0.4.0 vs .travis.yml in ahoy_email-0.5.0

@@ -1,17 +1,15 @@
 language: ruby
 rvm:
   - 2.3.0
 sudo: false
-script: RUBYOPT=W0 bundle exec rake test
+script: bundle exec rake test
 before_script:
   - gem install bundler
 notifications:
   email:
     on_success: never
     on_failure: change
 gemfile:
   - Gemfile
+  - test/gemfiles/actionmailer50.gemfile
   - test/gemfiles/actionmailer42.gemfile
-  - test/gemfiles/actionmailer41.gemfile
-  - test/gemfiles/actionmailer40.gemfile
-  - test/gemfiles/actionmailer32.gemfile