2.2.2

This is a gem housekeeping release. No user-facing changes.

🏠 Housekeeping

• Upgrade CI to use latest Ruby patch versions, including 3.1.1 (#144, #153) @mattbrictson
• Add Ruby 3.1.0 to CI matrix (#145) @mattbrictson
• Update rubocop-minitest requirement from 0.15.2 to 0.17.2 (#143, #150, #152) @dependabot
• Update rubocop requirement from 1.22.1 to 1.25.1 (#141, #142, #146, #149, #151) @dependabot
• Update rubocop-performance requirement from 1.11.5 to 1.13.2 (#140, #147, #148) @dependabot