.travis.yml in hedgelog-0.1.13.alpha.1 vs .travis.yml in hedgelog-0.2.0

@@ -1,7 +1,7 @@
 language: ruby
 cache: bundler
-rvm: 2.7
+rvm: 2.4
 before_install:
   - gem update --system
   - gem install bundler
 script:
 - bundle exec bundle-audit update && bundle exec bundle-audit check