ANN: pandoc 3.7

[John G Macfarlane]

I'm pleased to announce the release of pandoc 3.7,
available in the usual places:

Binary packages & changelog:
https://github.com/jgm/pandoc/releases/tag/3.7

Source & API documentation:
http://hackage.haskell.org/package/pandoc-3.7

- New command-line option `--variable-json`. This allows non-string
values (such as booleans or maps) to be given to template variables
on the command line.
- `--pdf-engine` will now accept `groff` as a value.
- Markdown and RST writers now allow row/colspans in grid tables.
In addition, table column widths will expand if needed to
contain text that can't be wrapped, avoiding the introduction
of unwanted whitespace.
- The `four_space_rule` extension now works for `plain` output.
- Roff formats now use the most portable syntax possible.
- Improved handling of inline TeX in Org-mode.
- In Lua filters, `pandoc.read` can now be used in "sandboxed"
mode, restricting file or network access, by passing in a
list of accessible files as a fourth parameter.

API changes:

- Text.Pandoc.Writers.Shared: new function `delimited`.
- Text.Pandoc.Writers.Shared: new version of `gridTable` with
changed parameters.
- Text.Pandoc.Class: new exported function `sandboxWithFileTree`.

Thanks to all who contributed, especially new contributors
Manolis Stamatogiannakis, Mohamed Akram, and Niklas Eicker.