Update markdown2 to 2.3.6

[pyup-bot]

This PR updates markdown2 from 2.2.1 to 2.3.6.

Changelog

2.3.6

- [pull 282] Add TOC depth option
- [pull 283] Fix to add TOC html to output via CLI
- [pull 284] Do not remove anchors in safe_mode
- [pull 288] fixing cuddled-lists with a single list item
- [pull 292] Fix Wrong rendering of last list element
- [pull 295] link-patterns fix
- [pull 300] Replace a deprecated method
- [pull 301] DeprecationWarning: invalid escape sequence
- [pull 302] Fix "make test" in Python 3
- [pull 303] Fix CVE-2018-5773

2.3.5

- [pull 238] Fenced code blocks lang with leading space
- [pull 260] Search for items only within metadata header
- [pull 264] highlightjs language class support
- [pull 265] FIPS compliance
- [pull 274] Fix for double amp replacement inside link title

2.3.4

- [pull 243] task list extra visual changes
- [pull 245] Don't let "target-blank-lines" break footnotes
- [pull 247] Translatable footnote titles
- [pull 252] Add pipe escaping in table extension

2.3.3

- [pull 236] Fix for safe_mode links regression
- [pull 235] Fix for overgreedy regex in metadata
- [pull 237] Fix for header-ids extra non-alpha character issue

2.3.2

- [pull 204] toc extra Python 3 error
- [pull 207] Performance improvements
- [pull 210] Leading paragraph with fenced code blocks
- [pull 212] Target blank links extra
- [pull 215] Optional metadata fences
- [pull 218] Github style task list
- [pull 220] Numbering extra
- [pull 224] Metadata in blocks
- [pull 230] safe_mode changes

2.3.1

- [pull 131] Markdown "spoiler" extra
- [pull 170] html-classes support for table tags
- [pull 190] "strike" extra
- [pull 201] Allow empty table cells

2.3.0

- New "tables" extra for table syntax that matches GFM
<https://help.github.com/articles/github-flavored-markdowntables> and
PHP-Markdown Extra <https://michelf.ca/projects/php-markdown/extra/table>.
For example:

     | Header 1 | *Header* 2 |
     | -------- | -------- |
     | `Cell 1` | [Cell 2](http://example.com) link |
     | Cell 3   | **Cell 4** |

See <https://github.com/trentm/python-markdown2/blob/master/test/tm-cases/tables.text>
for examples and edge cases.

If you have documents using the 'wiki-tables' syntax and want to convert to the
'tables' syntax, there is a script to help with that here:
<https://github.com/trentm/python-markdown2/blob/master/tools/wiki-tables-to-tables.py>

2.2.3

- [issue 165] Fix an edge case in list parsing.

2.2.2

- [pull 156] Footnotes XML compatibility.
- [pull 157] Horizontal rule minimum length.
- [pull 162] Fix escaping fenced code block with safe mode
- [pull 163] Fix code highlight with safe mode

Links

• PyPI: https://pypi.org/project/markdown2
• Changelog: https://pyup.io/changelogs/markdown2/
• Repo: https://github.com/trentm/python-markdown2

[pyup-bot]

Closing this in favor of #206