Update rubocop-performance requirement from ~> 1.18.0 to ~> 1.19.0

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@v1.18.0...v1.19.0)

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

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

Gemfile

@@ -49,7 +49,7 @@ group :development, :test do
   gem "pry-rails", "~> 0.3.4"
   gem "rspec-rails", "~> 6.0"
   gem "rubocop", "~> 1.56.0", require: false
-  gem "rubocop-performance", "~> 1.18.0", require: false
+  gem "rubocop-performance", "~> 1.19.0", require: false
   gem "rubocop-rails", "~> 2.20.1", require: false
   gem "rubocop-rspec", "~> 2.23.1", require: false
   gem "simplecov", "~> 0.22.0", require: false