.travis.yml in gistory-0.1.8 vs .travis.yml in gistory-0.2.0

@@ -1,9 +1,9 @@
 sudo: false
 language: ruby
 script:
   - bundle exec rspec
 rvm:
-  - 2.4.0
-  - 2.3.3
-  - 2.2.6
+  - 2.6.6
+  - 2.5.8
+  - 2.4.10
 before_install: gem install bundler -v 1.17.3