Added optional types for production if provided via options.

[pjmolina]

issue #11
Implements optional output type information via options.

[StoneCypher]

mostly for it

the only change i would make is before line 733, i'd do something like

const opts = typeof options === string? { parse: options } : options;

then work off opts, as a convenience for people who only want to add types to parse/n

but it's a minor convenience and unimportant