.travis.yml in distance_finder-1.0.2 vs .travis.yml in distance_finder-1.0.3

@@ -1,7 +1,10 @@
 sudo: false
 language: ruby
 rvm:
+  - 2.2.5
+  - 2.2.6
   - 2.3.3
+  - 2.4.0
 before_install: gem install bundler -v 1.13.7
 script:
 - bundle exec rake test