def normalize(value)
      [*attrs[:normalize]].each do |method|
        next unless method.is_a?(Symbol)

        value = value.send(method) if value.respond_to?(method)
      end

      value
    end
def normalize(value)
      [*attrs[:normalize]].each do |method|
        next unless method.is_a?(Symbol)

        value = value.send(method) if value.respond_to?(method)
      end

      value
    end
Apply each methods from attrs[:normalize] to the value if possible
 User input should not be used in this attrs[:normalize]

 e.g: normalize: :to_sym will return the symbol of the value
      normalize: [:to_sym, :upcase] Will return the upercased symbol

 @param [ Mixed ] value

 @return [ Mixed ]