Release for Python 3.13.0 compatibility

[decaz]

While using latest CPython 3.13.0 I'm seeing the following deprecation warning:

.venv/lib/python3.13/site-packages/feedparser/html.py:152: DeprecationWarning: 'count' is passed as positional argument
data = re.sub(r'<!((?!DOCTYPE\|--\|\[))', r'&lt;!\1', data, re.IGNORECASE)

I guess it causes bug in that case, because the flag is being passed instead of count.

@kurtmckee I see #389 fixed this but wasn't released yet. Could you release latest version with this merged fix inside please?

[decaz]

@kurtmckee do you have any updates or plans for release?

[dryya]

I know it'll be ready when it's ready, but I would also love to see a new release cut to take advantage of py3.13 support and static typing. It looks like there haven't been many code changes for the past few months, and in my minimal testing with feedparser built from latest develop, the current state of the code seems good to go! Thank you