CTAN update: l3kernel + l3backend

[CTAN Announcements]

The LaTeX Team submitted an update to the

            l3kernel + l3backend

packages.

Version:  2021-10-17
License:  lppl1.3c

Summary description:  LaTeX3 programming conventions

Announcement text:
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 ## [2021-10-17]

 ### Changed
 - Better DeviceN support

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The packages’ Catalogue entries can be viewed at
   https://ctan.org/pkg/l3kernel
   https://ctan.org/pkg/l3backend

The packages’ files themselves can be inspected at
   https://mirrors.ctan.org/macros/latex/contrib/l3kernel/
   https://mirrors.ctan.org/macros/latex/contrib/l3backend/

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   Thanks for the upload.

     For the CTAN Team
    Petra Rübe-Pugliese

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