.travis.yml in jekyll-maps-2.0.3 vs .travis.yml in jekyll-maps-2.0.4

@@ -1,10 +1,10 @@
 language: ruby
 rvm:
+- 2.4.1
 - 2.3.0
 - 2.2
 - 2.1
-- 2.0
 script: script/cibuild
 after_success:
   - bundle exec codeclimate-test-reporter
 sudo: false
 cache: bundler