chore(deps): update rubocop-performance requirement from ~> 1.19.1 to…

… ~> 1.20.2

Updates the requirements on [rubocop-performance](https://github.com/rubocop/rubocop-performance) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.19.1...v1.20.2)

---
updated-dependencies:
- dependency-name: rubocop-performance
  dependency-type: direct:production
...

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

Gemfile

@@ -8,4 +8,4 @@ source 'https://rubygems.org'
 
 gem 'rake', '~> 13.0'
 gem 'rubocop', '~> 1.59.0'
-gem 'rubocop-performance', '~> 1.19.1'
+gem 'rubocop-performance', '~> 1.20.2'