Bump rubocop-performance from 1.20.2 to 1.21.0

Bumps [rubocop-performance](https://github.com/rubocop/rubocop-performance) from 1.20.2 to 1.21.0.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.20.2...v1.21.0)

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

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

Gemfile

@@ -8,7 +8,7 @@ gem 'bundler', '~> 2.4'
 gem 'rake', '~> 13.1'
 gem 'rubocop', '~> 1.62', require: false
 gem 'rubocop-packaging', '~> 0.5.2', require: false
-gem 'rubocop-performance', '~> 1.20', require: false
+gem 'rubocop-performance', '~> 1.21', require: false
 gem 'rubocop-rake', '~> 0.6.0', require: false
 gem 'rubocop-rspec', '~> 2.27', require: false
 gem 'simplecov', '~> 0.22.0', require: false

Gemfile.lock

@@ -52,9 +52,9 @@ GEM
       rubocop (~> 1.41)
     rubocop-packaging (0.5.2)
       rubocop (>= 1.33, < 2.0)
-    rubocop-performance (1.20.2)
+    rubocop-performance (1.21.0)
       rubocop (>= 1.48.1, < 2.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
     rubocop-rspec (2.27.1)
@@ -80,7 +80,7 @@ DEPENDENCIES
   rake (~> 13.1)
   rubocop (~> 1.62)
   rubocop-packaging (~> 0.5.2)
-  rubocop-performance (~> 1.20)
+  rubocop-performance (~> 1.21)
   rubocop-rake (~> 0.6.0)
   rubocop-rspec (~> 2.27)
   simplecov (~> 0.22.0)