.travis.yml in devise-multi_email-2.0.1 vs .travis.yml in devise-multi_email-3.0.0

@@ -1,8 +1,9 @@
 language: ruby
 rvm:
-  - 2.3.1
-  - 2.4.1
+  - 2.4
+  - 2.5
+  - 2.6
 gemfile:
-  - gemfiles/rails_5_0.gemfile
-  - gemfiles/rails_4_2.gemfile
-before_install: gem install bundler -v 1.10.6
+  - gemfiles/rails_5_2.gemfile
+  - gemfiles/rails_5_1.gemfile
+before_install: gem install bundler