Bump rubocop-performance from 1.20.2 to 1.21.0 (#293)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -10,7 +10,7 @@ gem 'redcarpet', '~> 3.6.0'
 gem 'rspec', '~> 3.13.0'
 gem 'rubocop', '~> 1.61.0'
 gem 'rubocop-packaging', '~> 0.5.2'
-gem 'rubocop-performance', '~> 1.20.1'
+gem 'rubocop-performance', '~> 1.21.0'
 gem 'rubocop-rake', '~> 0.6.0'
 gem 'rubocop-rspec', '~> 2.27.0'
 gem 'rubocop-sorbet', '~> 0.8.0'

Gemfile.lock

@@ -61,9 +61,9 @@ 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 (2.27.0)
@@ -120,7 +120,7 @@ DEPENDENCIES
   rspec (~> 3.13.0)
   rubocop (~> 1.61.0)
   rubocop-packaging (~> 0.5.2)
-  rubocop-performance (~> 1.20.1)
+  rubocop-performance (~> 1.21.0)
   rubocop-rake (~> 0.6.0)
   rubocop-rspec (~> 2.27.0)
   rubocop-sorbet (~> 0.8.0)