.travis.yml in gerrit2jiracomment-0.2.9 vs .travis.yml in gerrit2jiracomment-0.2.12

@@ -1,10 +1,10 @@
 language: ruby
 rvm:
 - 2.5.0
 sudo: false
 before_install:
-- gem install bundler -v 1.16.1
+- gem install bundler -v 1.17.3
 before_script:
 - bundle install
 script:
 - env
 - bundle exec rake spec build