timcraft

Add support for signing API requests

4

From [the spec](https://github.com/Nexmo/client-library-specification/blob/master/SPECIFICATION.md#authenticating-requests): SHOULD allow a signature secret (used for some API requests, and to validate WebHook signatures) Using the signature secret to sign API requests is not yet supported.

Attempting to load the socket library on macOS fails with a number of undeclared identifier errors: $ bin/natalie -e "require 'socket'" /var/folders/wc/ng7w8yms69j6vpvqck4x2shh0000gn/T/natalie.cpp20221003-18022-x9mqwj:1181:81: error: use of undeclared identifier 'AF_AX25' auto const_set75...

Support parsing multiple files for one form field

5

This implements support for parsing multipart requests that contain multiple files with the same name. From [RFC7578 Section 4.3](https://www.rfc-editor.org/rfc/rfc7578#section-4.3): > To match widely deployed implementations, multiple files MUST be sent...