Fix DataFrame.applymap has been deprecated warning

[trymzet]

This is caused by this line in mkdocs_table_reader_plugin/markdown.py.

[timvink]

Thanks for mentioning. I don't want to force users to the lastest version of pandas though..

[timvink]

Related #54

[trymzet]

Understandable, but maybe you can add a version check?

if pd.__version__.startswith("2"):
    df = df.map(lambda s: replace_unescaped_pipes(s) if isinstance(s, str) else s)
else:
    df = df.applymap(lambda s: replace_unescaped_pipes(s) if isinstance(s, str) else s)

[timvink]

Yeah that's a good solution. Normally I wouldn't worry about these kinds of warnings, but some people run mkdocs using --strict mode

[timvink]

Just released v2.0.2 with this change!

Thanks for pushing this :)