fix: handling of multipart/form-data requests

[erunion]

• This fixes the implementation of form-data in multipart/form-data content types in order to accommodate library utilization within the browser where the native FormData component is used.
  • Key differences between form-data and FormData that was causing the library to fail in the browser were two issues:
    • The API for FormData.append has three arguments, and the third should only be present if the second is a Blob or USVString. It is never an object, as form-data requires it to be.
    • FormData.pipe() isn't a function.
• Fixes a bug in the Node request target that was causing fs.createReadStream pointers to be stringified and unusable.
• Updates the following targets to prioritize param.fileName if it's present, even if param.value also is:
  • Shell ↠ cURL
  • Node ↠ request
• Updates the Node request target to prefer single quotes in require statements and request.cookie calls. Since the rest of the snippet already preferred this, this change makes the whole snippet look a touch more cohesive and consistent.

Resolves#111

[reynolek]

@develohpanda Mind looking at this PR?

[reynolek]

@erunion I believe after merging the code that changed var -> const, this created a handful of merge conflicts.

[erunion]

@reynolek Conflicts resolved.

[develohpanda]

Awesome work, thanks for putting your time into this PR! I am largely unfamiliar with this topic, and your code comments were very useful. 💯

I have just a couple of notes and questions, however nothing major nor blocking!

[erunion]

@develohpanda Thanks for the review, and I've addressed your feedback.

[develohpanda]

Nicely done, thanks for your explanations as well!

[johanbook]

When will this fix be released @develohpanda?

[develohpanda]

@johanbook I have added a card to our board to publish a new version, we'll get to it hopefully this week or next week.

[reynolek]

Released in 1.23.0