Module 'scrapy_selenium' doesn't define any object named 'SeleniumDownloadHandler'

[tumregels]

In the docs you mention

# You need also to change the default download handlers, like so:
DOWNLOAD_HANDLERS = {
    "http": "scrapy_selenium.SeleniumDownloadHandler",
    "https": "scrapy_selenium.SeleniumDownloadHandler",
}

but in this plugin there is no such SeleniumDownloadHandler.