Update to Bundler, Ruby, Rubocop

• TargetRubyVersion: 3.0.2
• "bundler", "~> 1.16"
• "rake", "~> 12.0"
• "rubocop", "~> 0.74.0"

What's Changed

• Update rubocop-rspec requirement from ~> 1.22 to ~> 2.5 by @dependabot in #39

New Contributors

• @dependabot made their first contribution in #39

Full Changelog: v1.14.1...v1.21