.travis.yml in junk_drawer-1.6.1 vs .travis.yml in junk_drawer-1.6.2

@@ -1,11 +1,15 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.3.3
+  - 2.3
+  - 2.4
+  - 2.5
+  - 2.6
+  - 2.7
 addons:
   postgresql: '9.4'
-before_install: gem install bundler -v 1.13.6
+before_install: gem install bundler -v 2.0.2
 before_script:
   - createdb junk_drawer_test -U postgres
 script:
   - bundle exec rubocop
   - bundle exec rake