ghc-cmark-0.5.1-3.1

-  update to 0.5.1
  * Updated to libcmark 0.24.1.

- update to 0.5.0
  * Updated to libcmark 0.23.0.
  * API changes:
  + Added `OnEnter` and `OnExit` types.
  + In `NodeType`, `HRULE` is now `THEMATIC_BREAK`,
    `HTML` is `HTML_BLOCK`, `INLINE_HTML` is
    `HTML_INLINE`, `HEADER` is `HEADING`.  New
    constructors: `CUSTOM_INLINE`, `CUSTOM_BLOCK`.

- update to 0.4.1
  * Updated to libcmark 0.22.0
  * Bumped version bounds for HUnit.

- license update: BSD-3-Clause and BSD-2-Clause and MIT

- update to 0.4.0.1
  * API changes:
    + Added `commonmarkToLaTeX`, `nodeToLaTeX`, `optSafe`.
    + Changed type of `commonmarkToMan` and `nodeToMan`,
    adding `Maybe Int` param for width.
    + Changed type of `nodeToCommonMark`, changing the `Int` width
    parameter to a `Maybe Int`.
  * Updated to cmark 0.21 sources.

- update to 0.3.4
  * Updated to libcmark 0.20.0.

- initial commit