Literal::Structish could implement deconstruct_keys and deconstruct

[stevegeek]

This would be useful for use in pattern matching, eg

def deconstruct
  attributes.values
end

def deconstruct_keys(keys)
  h = attributes.to_h
  keys ? h.slice(*keys) : h
end

Happy to open PR to add if desired

[joeldrapper]

This sounds great!