.travis.yml in loggery-0.2.1 vs .travis.yml in loggery-0.3.0

@@ -1,16 +1,13 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.2
+  - 2.5.6
+  - 2.6.4
 gemfile:
-  - gemfiles/rails4.2.gemfile
-  - gemfiles/rails5.0.gemfile
-  - gemfiles/rails5.1.gemfile
   - gemfiles/rails5.2.gemfile
+  - gemfiles/rails6.0.gemfile
 before_install:
   - rvm use @global
-  - gem uninstall bundler -x
-  - gem install -v 1.17.2 bundler --no-rdoc --no-ri
-script:  
+script:
 - bundle exec rubocop
 - bundle exec rspec