config.gemspec in config-1.1.0 vs config.gemspec in config-1.1.1

@@ -20,11 +20,11 @@
   s.files = `git ls-files`.split($/)
   s.files.select! { |file| /(^lib\/|\.md$|\.gemspec$)/ =~ file }
   s.files += Dir.glob("doc/**/*")
 
   s.require_paths         = ["lib"]
-  s.required_ruby_version = ">= 2.2.2"
+  s.required_ruby_version = ">= 2.0.0"
 
   s.add_dependency "activesupport",           ">= 3.0"
   s.add_dependency "deep_merge",              "~> 1.0.1"
 
   s.add_development_dependency "bundler",     "~> 1.11.2"
@@ -37,9 +37,12 @@
   s.add_development_dependency "rails",       "~> 4.2.6"
   s.add_development_dependency "rspec",       "~> 3.4.0"
   s.add_development_dependency "rspec-rails", "~> 3.4.2"
   s.add_development_dependency "test-unit",   "~> 3.1.7"
   s.add_development_dependency "sqlite3"
+
+  # Static code analysis
+  s.add_development_dependency "mdl"
   s.add_development_dependency "rubocop"
 
   if ENV['TRAVIS']
     s.add_development_dependency "codeclimate-test-reporter"
   end