.travis.yml in cat_tree-1.1.0 vs .travis.yml in cat_tree-1.1.1

@@ -6,12 +6,13 @@
 before_script:
   - mysql -e 'create database cat_tree_test;'
   - bundle update
   - "bundle exec ruby spec/prepare.rb"
 rvm:
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
+  - 2.2.9
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
 gemfile:
   - gemfiles/rails42.gemfile
   - gemfiles/rails50.gemfile
   - gemfiles/rails51.gemfile
 matrix: