CTAN update: l3backend

[CTAN Announcements]

The LaTeX Team submitted an update to the

                l3backend

package.

Version:  2021-08-04
License:  lppl1.3c

Summary description:  LaTeX3 backend drivers

Announcement text:
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 ## [2021-08-04]

 ## Changed
 - Only use `pdfmanagement` module if active

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The package’s Catalogue entry can be viewed at
   https://ctan.org/pkg/l3backend

The package’s files themselves can be inspected at
   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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