Determines whether the given conversion request is supported, given the available content type conversions:
Matches all inputs to all outputs.
Handles the given input. This may only be called if canHandle did not reject. When unconditionally calling both in sequence, consider handleSafe instead.
A promise resolving when handling is finished.
Input data that will be handled if it can be handled.
A promise resolving if the input can be handled, rejecting with an Error if not.
Converts application/x-www-form-urlencoded data to application/json. Due to the nature of form data, the result will be a simple key/value JSON object.