Codable support, array in completion,

[krtc]

1. Add Codable Support

extension User: Codable { public enum CodingKeys: String, CodingKey { case name } }

2. Pass simple array in completion in replacement of ListResponse

func fetchNumbers(completion: @escaping (APIResult<[Number]>) -> Void)

[krtc]

@vaibhav-nickelfox @ravindrasoni

[krtc]

Adding open func requestForceJSONParseable to force parse object as JSONParseable.

Reason:

In functions like:

static func verify(otp: String, countryCode: String, number: String, completion: @escaping APICompletion<String>)

Here we try to parse a single string, and String confirms to both Codable and JSONParseable.
When we try to parse only one string, it by default try to parse it as Codable, and Codable is not able to parse a single string because it is not in JSON/Dictionary format.