Review input type for is_probably_readerable() function

[adbar]

The options passed to this functions should be of the Extractor type and not Any or dict, the tests have to be rewritten accordingly:

def is_probably_readerable(html: HtmlElement, options: Optional[Extractor] = None) -> bool:
...
    if options:
        option_dict = {attr: getattr(options, attr, None) for attr in options.__slots__}
    else:
        option_dict = {}