build(deps-dev): bump rubocop-performance from 1.21.0 to 1.21.1

Bumps [rubocop-performance](https://github.com/rubocop/rubocop-performance) from 1.21.0 to 1.21.1.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.21.0...v1.21.1)

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

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

Gemfile.lock

@@ -214,8 +214,8 @@ GEM
  actionpack (>= 4.2)
  omniauth (~> 2.0)
  orm_adapter (0.5.0)
- parallel (1.24.0)
- parser (3.3.2.0)
+ parallel (1.25.1)
+ parser (3.3.3.0)
  ast (~> 2.4.1)
  racc
  pg (1.5.6)
@@ -275,8 +275,8 @@ GEM
  responders (3.1.1)
  actionpack (>= 5.2)
  railties (>= 5.2)
- rexml (3.2.8)
- strscan (>= 3.0.9)
+ rexml (3.3.0)
+ strscan
  rollbar (3.5.2)
  rspec-core (3.13.0)
  rspec-support (~> 3.13.0)
@@ -308,7 +308,7 @@ GEM
  unicode-display_width (>= 2.4.0, < 3.0)
  rubocop-ast (1.31.3)
  parser (>= 3.3.1.0)
- rubocop-performance (1.21.0)
+ rubocop-performance (1.21.1)
  rubocop (>= 1.48.1, < 2.0)
  rubocop-ast (>= 1.31.1, < 2.0)
  rubocop-rails (2.25.0)