Bump rubocop-performance from 1.11.5 to 1.12.0

Bumps [rubocop-performance](https://github.com/rubocop/rubocop-performance) from 1.11.5 to 1.12.0.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.11.5...v1.12.0)

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

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

Gemfile.lock

@@ -82,7 +82,7 @@ GEM
       unicode-display_width (>= 1.4.0, < 3.0)
     rubocop-ast (1.12.0)
       parser (>= 3.0.1.1)
-    rubocop-performance (1.11.5)
+    rubocop-performance (1.12.0)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
     rubocop-rake (0.6.0)