CTAN update: l3kernel

[CTAN Announcements]

The LaTeX Team submitted an update to the

                   l3kernel

bundle.

Version:  2021-06-18
License:  lppl1.3c

Summary description:  LaTeX3 programming conventions

Announcement text:
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 ## [2021-06-18]

 ### Fixed
 - Local assignment to `\g__sys_backend_tl`
 - Incorrect internal function name (issue #939)
 - Case-changing exceptions for (u)pTeX (issue #939)
 - Low-level error if accent commands are not followed by
   letter when case changing (see #946)

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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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