Update rubocop requirement from = 0.82.0 to = 0.85.1

Updates the requirements on [rubocop](https://github.com/rubocop-hq/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.82.0...v0.85.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

tomo.gemspec

@@ -38,7 +38,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "minitest-ci", "~> 3.4"
   spec.add_development_dependency "minitest-reporters", "~> 1.3"
   spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "rubocop", "0.82.0"
+  spec.add_development_dependency "rubocop", "0.85.1"
   spec.add_development_dependency "rubocop-minitest", "0.9.0"
   spec.add_development_dependency "rubocop-performance", "1.6.1"
 end