.travis.yml in stream-chat-ruby-1.1.3 vs .travis.yml in stream-chat-ruby-2.0.0

@@ -1,9 +1,10 @@
 language: ruby
 before_install:
   - gem update bundler
 rvm:
-  - 2.3
-  - 2.4
   - 2.5
   - 2.6
   - 2.7
+script:
+  - bundle exec rake rubocop
+  - bundle exec rake test