language: ruby
rvm:
  - 2.3.0
  - 2.4
  - 2.5
  - 2.6
  - truffleruby
services:
  - redis-server
script: bundle exec rspec spec
sudo: false

language: ruby
rvm:
  - 2.5
  - 2.6
  - 2.7
  - 3.0
  - truffleruby
services:
  - redis-server
script: bundle exec rspec spec
sudo: false

Add Ruby 2.7 and 3.0 tests and drop Ruby 2.3 and 2.4
Add Ruby 2.7 and 3.0 tests and drop Ruby 2.3 and 2.4

Sicne net-imap is updated, we need to drop support for older Rubies.
