Made json = true with body and json = object equivalent

[daniel-carvalho]

Made json = true with body and json = object equivalent and unified form processing.

PR Checklist:

• I have run npm test locally and all tests are passing.
• I have added/updated tests for any new behavior.
• If this is a significant change, an issue has already been created where the problem / solution was discussed: Request options.json and options.form inconsistencies #2813

PR Description

Please see issue #2813 to see the objectives of this change, and why they were made.

[daniel-carvalho]

Hmmm odd, all the tests passed on local, but not here. I'd appreciate any feedback.

I've had only a cursory glance, but it looks like some tests are failing because of header casing, which seems unrelated to my change.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.