Bump rubocop-rspec from 3.3.0 to 3.4.0 (#587)

Bumps [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) from 3.3.0 to 3.4.0.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-rspec/compare/v3.3.0...v3.4.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -282,7 +282,7 @@ GEM
       rubocop-minitest
       rubocop-performance
       rubocop-rails
-    rubocop-rspec (3.3.0)
+    rubocop-rspec (3.4.0)
       rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
     ruby-vips (2.2.2)