WebGL custom player prefs to fix player prefs reset bug on itch.io

void ICustomPlayerPrefs.Save()
{
    BinaryFormatter bf = new BinaryFormatter();

    using (FileStream fs = File.Create(_path))
    {
        bf.Serialize(fs, _data);
    }

    PlayerPrefs.SetString("forceSave", string.Empty);
    PlayerPrefs.Save();
}