Update aruba requirement from ~> 0.5 to ~> 1.1

Updates the requirements on [aruba](https://github.com/cucumber/aruba) to permit the latest version.
- [Release notes](https://github.com/cucumber/aruba/releases)
- [Changelog](https://github.com/cucumber/aruba/blob/master/CHANGELOG.md)
- [Commits](cucumber/aruba@v0.5.0...v1.1.0)

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

Author: dependabot-preview[bot]

omnibus.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency "pedump"
 
   gem.add_development_dependency "artifactory", "~> 3.0"
-  gem.add_development_dependency "aruba",       "~> 0.5"
+  gem.add_development_dependency "aruba",       "~> 1.1"
   gem.add_development_dependency "chefstyle",   "= 1.7.4"
   gem.add_development_dependency "fauxhai-ng",  ">= 7.5"
   gem.add_development_dependency "rspec",       "~> 3.0"