Markdown2

- [pull 413] Fix meta indentation
- [pull 414] Fix code surrounded by blank lines inside blockquote fenced code blocks
- [pull 417] Fix inline code pipe symbol within tables (issue 399)
- [pull 418] Fix code block parsing error (issue 327)
- [pull 419] Fix hr block created when not supposed to (issue 400)
- [pull 421] Fix backslashes removed by adjacent code blocks (issues 369 and 412)
- [pull 420] Fix md5-* in resulting HTML when several code blocks follow one by one (issue 355)
- [pull 422] Fix excessive `<br>` tags in lists using break-on-newline extra (issue 394)
- [pull 424] Standardize key and value definitions for metadata extra (issue 423)
- [pull 427] Fix fenced code blocks breaking lists (issue 426)
- [pull 429] Fix catastrophic backtracking (Regex DoS) in pyshell blocks.
- [pull 431] Fix incorrect indentation of fenced code blocks within lists
- [pull 436] RST admonitions
- [pull 430] Improve error message if link_patterns forgotten
- [pull 437] fix compatibility with pygments 2.12

- [pull 408] Fix for fenced code blocks issue 396
- [pull 410] Be more strict on auto linking urls, RE DOS fix

- [pull 389] Tables extra: allow whitespace at the end of the underline row
- [pull 392] Pyshell extra: enable syntax highlighting if `fenced-code-blocks` is loaded.
- [pull 402] Regex DOS bandaid fix

- [pull 377] Fixed bug breaking strings elements in metadata lists
- [pull 380] When rendering fenced code blocks, also add the `language-LANG` class
- [pull 387] Regex DoS fixes

- [pull 356] Don't merge sequential quotes into a single blockquote
- [pull 357] use style=text-align for table alignment
- [pull 360] introduce underline extra
- [pull 368] Support for structured and nested values in metadata
- [pull 371] add noopener to external links

- [pull 335] Added header support for wiki tables
- [pull 336] Reset _toc when convert is run
- [pull 353] XSS fix
- [pull 350] XSS fix