Gemfile in mixlib-install-3.12.7 vs Gemfile in mixlib-install-3.12.11

@@ -2,33 +2,30 @@
 
 gemspec
 
 gem "chef-utils", "= 16.6.14" if RUBY_VERSION < "2.6.0"
 
-group :docs do
-  gem "github-markup"
-  gem "redcarpet"
-  gem "yard"
-end
-
 group :test do
   gem "rake"
   gem "rspec"
   gem "vcr"
+  gem "webrick"
   gem "webmock", "~> 3.4"
   gem "aruba", "~> 0.14"
   gem "cucumber", "~> 1.3.20"
-  gem "climate_control"
+  if RUBY_VERSION < "2.5.0"
+    gem "climate_control", "= 0.1.0"
+  else
+    gem "climate_control", "~> 1.0"
+  end
 end
 
-if RUBY_VERSION =~ /^2/
-  group :chefstyle do
-    gem "chefstyle", "~> 0.4.0"
-  end
+# use old chefstyle to support TargetRubyVersion of 1.9
+group :chefstyle do
+  gem "chefstyle", "~> 0.4.0"
 end
 
 group :debug do
   gem "pry"
   gem "pry-byebug"
-  gem "pry-stack_explorer", "~> 0.4.0" # pin until we drop ruby < 2.6
   gem "rb-readline"
 end