(SQUASHME) Add puppet_litmus conditions based on ruby version

Author: tvpartytonight

Gemfile

@@ -72,8 +72,14 @@ group :development, :release_prep do
   gem "puppet-blacksmith", '~> 7.0',      require: false
 end
 group :system_tests do
-  gem "puppet_litmus", '~> 2.0',        require: false, platforms: [:ruby, :x64_mingw] if !ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
-  gem "puppet_litmus", '~> 1.0',        require: false, platforms: [:ruby, :x64_mingw] if ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
+
+  if RUBY_VERSION.start_with?('2')
+    gem "puppet_litmus", '~> 1.0'
+  else
+    gem "puppet_litmus", '~> 2.0',        require: false, platforms: [:ruby, :x64_mingw] if !ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
+    gem "puppet_litmus", '~> 1.0',        require: false, platforms: [:ruby, :x64_mingw] if ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
+  end
+
   gem "CFPropertyList", '< 3.0.7',      require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "serverspec", '~> 2.41',          require: false
   gem "voxpupuli-acceptance", '~> 3.2', require: false