Changes

magic.endpoint

Added support for retrieving request HTTP headers, using the following two slots.

• [request.headers.get] - Returns the value of the specified HTTP request header
• [request.headers.list] - Returns the key/value of all HTTP request headers

Breaking changes - Also renamed the HTTP response manipulation slots, removing the "http." prefix.
This might render existing Hyperlambda files incompatible, at which point you'll have to
rename your slot invocations. Search through your Hyperlambda files for "http.response" to
fix these issues, if backwards compatibility is an issue for you. Also the status-code slot had its name
updated, removing the "-code" parts, in addition to the _"http." parts.

magic.data.common

Minor simplifications

magic.lambda.mail

Minor simplifications

magic.lambda.math

Fixed severe error with increment/decrement slots

magic.lambda.io

Fixed severe error with folder resolving when finding root URL

magic.lambda.json

Fixed severe error when returning DateTime objects.