The value field in the ThresholdsStep should be a Number?

[iguissouma]

Hello, thanks for this great DSL!

I'm not a graphana expert, I started playing with the DSL, I think the value field in the ThresholdsStep should be a Number?

class ThresholdsStep(private val value: String = "null", private val color: Color = Color.GREEN) : Json<JSONObject> {

    override fun toJson(): JSONObject = jsonObject {
        "value" to value
        "color" to color.asHexString()
    }
}

thanks in advance.