Cannot build PDFs when using latest version of beautifulsoup4 >= 4.10

Hi,

Environment: Python 3.9, Alpine 3.14 MkDocs version: 1.1.2 Plugin version: 0.9.3

When building with mkdocs build:

INFO    -  [macros] - Macros arguments: {'module_name': 'main', 'modules': [], 'include_dir': 'includes', 'include_yaml': [], 'j2_block_start_string': '', 'j2_block_end_string': '', 'j2_variable_start_string': '', 'j2_variable_end_string': '', 'verbose': False} 
INFO    -  [macros] - Extra variables (config file): ['social', 'doc_version', 'caddy_version'] 
INFO    -  [macros] - Extra filters (module): ['pretty'] 
INFO    -  [macros] - Includes directory: includes 
INFO    -  Cleaning site directory 
INFO    -  Building documentation to directory: /docs/dist 
INFO    -  Number headings up to level 3. 
INFO    -  |  (exclude 'changelog/:changelog') 
INFO    -  Generate a table of contents up to heading level 2. 
INFO    -  |  (exclude 'changelog/:changelog') 
INFO    -  Generate a cover page with "default_cover.html.j2". 
INFO    -  Converting <img> alignment(workaround). 
Traceback (most recent call last):
  File "/usr/local/bin/mkdocs", line 8, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1137, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1062, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1668, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 763, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/mkdocs/__main__.py", line 152, in build_command
    build.build(config.load_config(**kwargs), dirty=not clean)
  File "/usr/local/lib/python3.9/site-packages/mkdocs/commands/build.py", line 295, in build
    config['plugins'].run_event('post_build', config=config)
  File "/usr/local/lib/python3.9/site-packages/mkdocs/plugins.py", line 96, in run_event
    result = method(**kwargs)
    html_string = self._render_js(soup)
  File "/usr/local/lib/python3.9/site-packages/mkdocs_with_pdf/generator.py", line 381, in _render_js
    tag.text = self._mixed_script
AttributeError: can't set attribute

It seems related by changes on tag introduced in beautifulsoup4 v4.10+. Not yet sure, anyway, a workaround is to pip install first beautifulsoup4==4.9.3 then install this plugin to make it works again.

orzih / mkdocs-with-pdf

Cannot build PDFs when using latest version of beautifulsoup4 >= 4.10 #79