源码：
`import UIKit
import HandyJSON

class MyModel: HandyJSON {
var name: String = ""
var height: String = ""
required init() {

}

}

class TestAsyncAwait: UIViewController{

override func viewDidLoad() {
    super.viewDidLoad()
    self.testModel()
}

func testModel(){
    let json = "{\"name\":\"abc\", \"height\":0.5}"
    let model = MyModel.deserialize(from: json)
    print("model", model?.toJSONString())
}

}
`

iPhone12 iOS14.2 异常0.5=>"0,5" 点号变成逗号
执行结果：
model Optional("{\"height\":\"0,5\",\"name\":\"abc\"}")

iPhoneXS iOS14.2 正常0.5=>"0.5"
执行结果：
model Optional("{\"height\":\"0.5\",\"name\":\"abc\"}")