Bump rubocop from 1.48.1 to 1.50.1

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.48.1 to 1.50.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.48.1...v1.50.1)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -52,7 +52,7 @@ end
 group :development, :test do
   gem 'byebug'
   gem 'listen'
-  gem 'rubocop', '~> 1.48', require: false
+  gem 'rubocop', '~> 1.50', require: false
 end
 
 group :test do