Update gc_ruboconfig requirement from ~> 4.4.2 to ~> 5.0.2

Updates the requirements on [gc_ruboconfig](https://github.com/gocardless/ruboconfig) to permit the latest version.
- [Release notes](https://github.com/gocardless/ruboconfig/releases)
- [Changelog](https://github.com/gocardless/gc_ruboconfig/blob/master/CHANGELOG.md)
- [Commits](gocardless/gc_ruboconfig@v4.4.2...v5.0.2)

---
updated-dependencies:
- dependency-name: gc_ruboconfig
  dependency-type: direct:development
...

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

bucket_store.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.add_dependency "aws-sdk-s3", ">= 1.147"
   s.add_dependency "google-cloud-storage", ">= 1.50"
 
-  s.add_development_dependency "gc_ruboconfig", "~> 4.4.2"
+  s.add_development_dependency "gc_ruboconfig", "~> 5.0.2"
   s.add_development_dependency "pry-byebug", "~> 3.10"
   s.add_development_dependency "rspec", "~> 3.13"
   s.add_development_dependency "rspec-github", "~> 2.4.0"