What's Changed

• Stop depending on Set by @casperisfine in https://github.com/rails/spring/pull/659
• Drop support to Ruby < 2.7 and Rails < 6.0 by @rafaelfranca in https://github.com/rails/spring/pull/661
• Modernize spring binstubs and disable it in production by @rafaelfranca in https://github.com/rails/spring/pull/662

Full Changelog: https://github.com/rails/spring/compare/v3.1.1...v4.0.0