Update rubocop-performance requirement from ~> 1.14.2 to ~> 1.15.0

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@v1.14.2...v1.15.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

common/dependabot-common.gemspec

@@ -44,7 +44,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.8"
   spec.add_development_dependency "rspec-its", "~> 1.2"
   spec.add_development_dependency "rubocop", "~> 1.36.0"
-  spec.add_development_dependency "rubocop-performance", "~> 1.14.2"
+  spec.add_development_dependency "rubocop-performance", "~> 1.15.0"
   spec.add_development_dependency "ruby-debug-ide", "~> 0.7.3"
   spec.add_development_dependency "simplecov", "~> 0.21.0"
   spec.add_development_dependency "simplecov-console", "~> 0.9.1"