Update rubocop-ast requirement from ~> 1.4.1 to ~> 1.28.1dependabot/bundler/rubocop-ast-tw-1.28.1

Updates the requirements on [rubocop-ast](https://github.com/rubocop/rubocop-ast) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-ast/releases)
- [Changelog](https://github.com/rubocop/rubocop-ast/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-ast/compare/v1.4.1...v1.28.1)

---
updated-dependencies:
- dependency-name: rubocop-ast
  dependency-type: direct:development
...

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

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index f071fe5..f253f2c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ group :test do
   gem "chefstyle"
   gem "rake"
   gem "rspec", "~> 3.0"
-  gem "rubocop-ast", "~> 1.4.1" # Drop this dependency/version when we remove ruby-2.4 support
+  gem "rubocop-ast", "~> 1.28.1" # Drop this dependency/version when we remove ruby-2.4 support
 end
 
 group :debug do