.travis.yml in pg_objects-0.4.2 vs .travis.yml in pg_objects-0.4.3

@@ -2,9 +2,10 @@
 language: ruby
 rvm:
   - 2.3.8
   - 2.4.5
   - 2.5.3
+  - 2.6.0
 before_install: gem install bundler -v 1.16.2
 script:
  - bundle exec rspec spec
  - bundle exec rubocop