CTAN update: l3kernel

[CTAN Announcements]

The LaTeX Project Team submitted an update to the

                     l3kernel

package.

Version:  2023-03-30
License:  lppl1.3c

Summary description:  LaTeX3 programming conventions

Announcement text:
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 ### Added
 - `\tex_endlocalcontrol:D` as expl3 name for the LuaTeX primitive

 ### Changed
 - Allow non-integer values in color expressions
 - Restrict color expressions values to the range [0, 100]
 - Leave Greek spacing diacritics unchanged in uppercasing

 ### Fixed
 - Fix minor version in `\c_sys_engine_version_str` for pdfTeX and LuaTeX
   (issue [\#1186](https://github.com/latex3/latex3/issues/1186))

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The package’s Catalogue entry can be viewed at
   https://ctan.org/pkg/l3kernel

The package’s files themselves can be inspected at
   https://mirrors.ctan.org/macros/latex/contrib/l3kernel/

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   Thanks for the upload.

     For the CTAN Team
    Petra Rübe-Pugliese

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