Bump minimum to 2.7

.expeditor/verify.pipeline.yml

@@ -8,22 +8,6 @@ expeditor:
 
 steps:
 
-- label: run-lint-and-specs-ruby-2.5
-  command:
-    - .expeditor/run_linux_tests.sh rake
-  expeditor:
-    executor:
-      docker:
-        image: ruby:2.5
-
-- label: run-lint-and-specs-ruby-2.6
-  command:
-    - .expeditor/run_linux_tests.sh rake
-  expeditor:
-    executor:
-      docker:
-        image: ruby:2.6
-
 - label: run-lint-and-specs-ruby-2.7
   command:
     - .expeditor/run_linux_tests.sh rake

Gemfile

@@ -4,12 +4,12 @@ source "https://rubygems.org"
 gemspec
 
 group :test do
-  gem "activesupport", "< 6" # this dep can be removed when we drop Ruby 2.4 support
+  gem "activesupport"
   gem "chefstyle"
-  gem "cucumber", "< 5" # remove the version pin when we drop Ruby 2.4 support
+  gem "cucumber", "~> 9.1.0"
   gem "rake"
   gem "rspec", "~> 3.7"
-  gem "rubocop-ast", "= 1.4.1" # Drop this dependency/version when we remove ruby-2.4 support
+  gem "rubocop-ast"
 end
 
 group :debug do

mixlib-log.gemspec

@@ -11,5 +11,5 @@ Gem::Specification.new do |gem|
   gem.authors = ["Chef Software, Inc."]
   gem.files = %w{LICENSE} + Dir.glob("lib/**/*", File::FNM_DOTMATCH).reject { |f| File.directory?(f) }
   gem.require_paths = ["lib"]
-  gem.required_ruby_version = ">= 2.5"
+  gem.required_ruby_version = ">= 2.7"
 end