gems(deps-dev): bump rubocop-performance from 1.20.1 to 1.21.0

Bumps [rubocop-performance](https://github.com/rubocop/rubocop-performance) from 1.20.1 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@v1.20.1...v1.21.0)

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

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

Gemfile.lock

@@ -258,17 +258,17 @@ GEM
       rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
-      parser (>= 3.2.1.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
     rubocop-capybara (2.19.0)
       rubocop (~> 1.41)
     rubocop-factory_bot (2.25.1)
       rubocop (~> 1.41)
     rubocop-gitlab-security (0.1.1)
       rubocop (>= 0.51)
-    rubocop-performance (1.20.1)
+    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-rails (2.23.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)