Document Response and Request constructors

[rikhuijzer]

The documentation for using HTTP.Response and HTTP.Request wasn't very clear in the REPL. This PR changes the documentation for HTTP.Response from

help?> HTTP.Response
  Response <: Message

  Represents a HTTP Response Message.

    •    version::VersionNumber RFC7230 2.6 (https://tools.ietf.org/html/rfc7230#section-2.6)

    •    status::Int16 RFC7230 3.1.2 (https://tools.ietf.org/html/rfc7230#section-3.1.2) RFC7231 6
        (https://tools.ietf.org/html/rfc7231#section-6)

    •    headers::Vector{Pair{String,String}} RFC7230 3.2
        (https://tools.ietf.org/html/rfc7230#section-3.2)

    •    body::Vector{UInt8} RFC7230 3.3 (https://tools.ietf.org/html/rfc7230#section-3.3)

    •    request, the Request that yielded this Response.

to

help?> HTTP.Response
  Response <: Message

  Represents a HTTP Response Message.

    •    version::VersionNumber RFC7230 2.6 (https://tools.ietf.org/html/rfc7230#section-2.6)

    •    status::Int16 RFC7230 3.1.2 (https://tools.ietf.org/html/rfc7230#section-3.1.2) RFC7231 6
        (https://tools.ietf.org/html/rfc7231#section-6)

    •    headers::Vector{Pair{String,String}} RFC7230 3.2
        (https://tools.ietf.org/html/rfc7230#section-3.2)

    •    body::Vector{UInt8} RFC7230 3.3 (https://tools.ietf.org/html/rfc7230#section-3.3)

    •    request, the Request that yielded this Response.

  ─────────────────────────────────────────────────────────────────────────────────────────────────────

  Response(status::Int, headers=[]; body=UInt8[], request=nothing) -> HTTP.Response

  ─────────────────────────────────────────────────────────────────────────────────────────────────────

  HTTP.Response(status::Int, body) -> HTTP.Response

  Examples
  ==========

  HTTP.Response(200, "Hello")

  headers = ["Server" => "Apache"]
  HTTP.Response(200, headers; body = "Hello")

and changes the documentation from HTTP.Request from

help?> HTTP.Request
  Request <: Message

  Represents a HTTP Request Message.

    •    method::String RFC7230 3.1.1 (https://tools.ietf.org/html/rfc7230#section-3.1.1)

    •    target::String RFC7230 5.3 (https://tools.ietf.org/html/rfc7230#section-5.3)

    •    version::VersionNumber RFC7230 2.6 (https://tools.ietf.org/html/rfc7230#section-2.6)

    •    headers::Vector{Pair{String,String}} RFC7230 3.2
        (https://tools.ietf.org/html/rfc7230#section-3.2)

    •    body::Vector{UInt8} RFC7230 3.3 (https://tools.ietf.org/html/rfc7230#section-3.3)

    •    response, the Response to this Request

    •    txcount, number of times this Request has been sent (see RetryRequest.jl).

    •    parent, the Response (if any) that led to this request (e.g. in the case of a redirect).
        RFC7230 6.4 (https://tools.ietf.org/html/rfc7231#section-6.4)

to

help?> HTTP.Request
  Request <: Message

  Represents a HTTP Request Message.

    •    method::String RFC7230 3.1.1 (https://tools.ietf.org/html/rfc7230#section-3.1.1)

    •    target::String RFC7230 5.3 (https://tools.ietf.org/html/rfc7230#section-5.3)

    •    version::VersionNumber RFC7230 2.6 (https://tools.ietf.org/html/rfc7230#section-2.6)

    •    headers::Vector{Pair{String,String}} RFC7230 3.2
        (https://tools.ietf.org/html/rfc7230#section-3.2)

    •    body::Vector{UInt8} RFC7230 3.3 (https://tools.ietf.org/html/rfc7230#section-3.3)

    •    response, the Response to this Request

    •    txcount, number of times this Request has been sent (see RetryRequest.jl).

    •    parent, the Response (if any) that led to this request (e.g. in the case of a redirect).
        RFC7230 6.4 (https://tools.ietf.org/html/rfc7231#section-6.4)

  ─────────────────────────────────────────────────────────────────────────────────────────────────────

  HTTP.Request(method, target, headers, body; version, parent) -> HTTP.Request

  Constructor for HTTP.Request. For daily use, see HTTP.request.

[quinnj]

Thanks for the contribution!