Update gc_ruboconfig requirement from ~> 4.3 to ~> 5.0

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@v4.3.0...v5.0.0)

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

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

ibandit.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.required_ruby_version = ">= 2.7.0"
-  spec.add_development_dependency "gc_ruboconfig",   "~> 4.3"
+  spec.add_development_dependency "gc_ruboconfig",   "~> 5.0"
   spec.add_development_dependency "nokogiri",        "~> 1.6"
   spec.add_development_dependency "pry",             "~> 0.13"
   spec.add_development_dependency "pry-byebug",      "~> 3.10"