v3.1.0

• Add Ruby 3.x support
• Add support for Sequel 5.x (4.x can still work but not recommended)
• Upgrade stream-ruby and fix delete activity by foreign id call
• Handle deprecations for rspec should vs expect

v3.0.0

• Drop support Ruby <2.5 and add 2.7.x
• Drop support Rails <5.0 and Rails 6.x
• Use stream-ruby 4.x
• Add support to customize feed via actor for a polymorphic class
• Improve readme and add a changelog
• Migrate GitHub actions and enable Rubocop and fix detected issues