Add beautiful_soup_parser option

[vincentkelleher]

Hi 👋

As per my issue #205 and #58, I propose the following changes to allow users to choose which parser they want to use with BeautifulSoup 😇

As a quick refresher, at the moment, only html.parser is available as the default HTML parser when using the markdownify(..) method. It's still possible to use the MarkdownConverter(options).convert_soup(..) method but having both solution si more convenient IMHO.

I haven't written any specific test for other kinds of HTML parsers as I didn't want to add extra dependencies to this project. If required I could add development dependencies only to run those specific tests.

Thanks @AlexVonB for your help with this subject 🙏

[AlexVonB]

Hey Vincent, thanks for your PR! Looks great! Could you please add the parameter to the command line interface? https://github.com/matthewwithanm/python-markdownify/blob/develop/markdownify/main.py As soon as this is added I will merge this. Thanks again!

[vincentkelleher]

Hi @AlexVonB,

Thank you for your feedback, I've just taken it into account.

I used the following commands to test out the new argument in the CLI:

pip install ".[dev]"
pip install html5lib

markdownify -p html5lib <HTML_FILE>

Everything works fine with the examples of #205 👍

[AlexVonB]

Thanks a lot! 🥳