Update rubocop-performance requirement from 1.8.0 to 1.8.1

Updates the requirements on [rubocop-performance](https://github.com/rubocop-hq/rubocop-performance) to permit the latest version.
- [Release notes](https://github.com/rubocop-hq/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop-performance/compare/v1.8.0...v1.8.1)

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

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 4aca5483..229e58b0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ group :development do
   gem "rspec-core", "~> 3.0"
   gem "rspec-expectations", "~> 3.0"
   gem "rspec-mocks", "~> 3.0"
-  gem "rubocop-performance", "1.8.0"
+  gem "rubocop-performance", "1.8.1"
   gem "rubocop-rspec"
 end