Add options method

[ir4y]

Sometimes you need to perform OPTIONS HTTP query.
It's a part of RFC7231 https://tools.ietf.org/html/rfc7231#section-4.3.7

BTW maybe it makes sense to make requestWithVerbAndUrl public

[lukewestby]

Looks good! Can you change the version number to be a minor version bump instead of a patch bump? Regarding making requestWithVerbAndUrl public, there are only so many HTTP verbs -- I think the only two left after this are TRACE and HEAD -- so they can all be included as separate functions at some point without crowding the API too much. Thanks!

[ir4y]

It's done.

[lukewestby]

awesome, thanks!