.travis.yml in machinist_redux-3.0.3 vs .travis.yml in machinist_redux-3.0.4

@@ -1,17 +1,19 @@
 ---
 language: ruby
 
 rvm:
   - ruby-head
+  - 2.5.1
   - 2.4.1
   - 2.3.4
   - 2.2.6
 
 gemfile:
   - gemfiles/rails_4.2.gemfile
   - gemfiles/rails_5.0.gemfile
   - gemfiles/rails_5.1.gemfile
+  - gemfiles/rails_5.2.gemfile
 
 matrix:
   allow_failures:
     - rvm: ruby-head