Merge pull request #54 from koic/specify_unset_nil_to_config_loader_merge_with_default

Specify `unset_nil: false` to `ConfigLoader.merge_with_default`

Author: koic

lib/rubocop/rails/inject.rb

@@ -10,7 +10,7 @@ def self.defaults!
         hash = ConfigLoader.send(:load_yaml_configuration, path)
         config = Config.new(hash, path)
         puts "configuration from #{path}" if ConfigLoader.debug?
-        config = ConfigLoader.merge_with_default(config, path)
+        config = ConfigLoader.merge_with_default(config, path, unset_nil: false)
         ConfigLoader.instance_variable_set(:@default_configuration, config)
       end
     end