Properly support properties with BINDABLE

    Q_PROPERTY(int score BINDABLE scoreBindable FINAL)
public:
    QBindable<int> scoreBindable() { return QBindable<int>(&m_score); }
private:
    QProperty<int> m_score;

import QtQml
import samegame

Score {
    id: root
    score: 10
    property int highscore: 0
    onScoreChanged: if (score > highscore) highscore = score

    property Timer t: Timer {
        interval: 10
        running: true
        repeat: true
        onTriggered: {
            root.score += 10;
            console.log(root.score, root.highscore)
        }
    }
}

QQmlApplicationEngine failed to load component
qrc:/QtExamples/samegame/scoreUser.qml:6:12: Invalid property assignment: "score" is a read-only property