appium自动识别兼容的chromedriver

1. chromeDriver所有版本下载路径:https://npm.taobao.org/mirrors/chromedriver
2. 将下载的chromeDriver放置与固定目录，如“E:\\drivers”
3. 设置Desired Capablity

　　　　capabilities.SetCapability("chromedriverExecutableDir", "E:\\drivers");