ExpressibleByDictionaryLiteral for JSONBodyParameters

[417-72KI]

There are redundant codes for initializing JSONBodyParameters.
I make it possible to initialize simply from Dictionary Literal.

Before

let object = ["foo": 1, "bar": 2, "baz": 3]
let parameters = JSONBodyParameters(JSONObject: object)

After

let parameters: JSONBodyParameters = ["foo": 1, "bar": 2, "baz": 3]

or

let parameters = ["foo": 1, "bar": 2, "baz": 3] as JSONBodyParameters

[Econa77]

Thanks 👍