如何在量角器中设置打开的Safari浏览器预览

由于Safari浏览器在调整窗口大小方面存在问题，因此Safari预览版中已修复此错误。但是，我不知道如何打开量角器中的safari预览（我安装它）。我尝试了下面的设置，但它不起作用。

Because safari has a issue with resize windows and this bug has been fixed in Safari Preview. However, i don't know how to open safari preview in protractor (i installed it). I tried below setting but it does not work.

capabilities: {
        'browserName': 'safari',

        safariOptions: { technologyPreview: true }
    },