Log Message:
textproc/hs-commonmark-extensions: Update to 0.2.4

0.2.4
* Make pipe_tables extension treat backslash escapes like GH does (#112,
  Michael Howell). This change essentially changes the way the text \\|
  gets parsed inside a table. In the old version, the first backslash
  escapes the second backslash, and then the pipe is treated as a cell
  separator. In the new version, the pipe is still preceded by a backslash,
  so it is still literal text. The escaping rule is documented in detail in
  the spec for this extension. This change also aligns our escaping of
  pipes with GitHub's.

0.2.3.6
* Fix pipe table parser so that |s don't interfere with other block
  structures (Michael Howell, #111, fixing #52 and #95). This parser is
  structured as a system that parses the second line first, then parses the
  first line. That is, if it detects a delimiter row as the second line of
  a paragraph, it converts the paragraph into a table. This seems
  counterintuitive, but it works better than trying to convert a table into
  a paragraph, since it might need to be something else.
* Improve parsing of inline math (#110).

0.2.3.5
* Resolve entities inside wikilinks (#105, Michał Kukieła).

0.2.3.4
* Require whitespace after definition list marker (#104). Otherwise we can
  inadvertently clobber strikeout or subscript.