Compatiblility shim for updating to SwiftyJSON v4.0.0

SwiftyJSONExtensions.swift

import SwiftyJSON

public extension JSON {
    // Compatiblility shim for updating to SwiftyJSON v4.0.0
    // See changes introduced by: https://github.com/SwiftyJSON/SwiftyJSON/pull/833
    init(data: Data) {
        do {
            try self.init(data: data, options: [])
        } catch {
            self.init(jsonObject: NSNull())
        }
    }
}