JSON Decoder which uses NSISO8601Formatter (or any other custom)

JSONDecoder+DateFormatting.swift

extension JSONDecoder.DateDecodingStrategy {
    static var iso8601Custom: JSONDecoder.DateDecodingStrategy {
        return .custom { decoder in
            let container = try decoder.singleValueContainer()
            let string = try container.decode(String.self)
            guard let date = DateFormatter.iso8601Mapping.date(from: string) else {
                throw DecodingError.dataCorruptedError(in: container,
                                                       debugDescription: "Date is in invalid format")
            }
            return date
        }
    }
}