[lltx] luatextra: Please update

[Christian Stadelmann]

Dear maintainers of luatextra,

could you please release an updated version of luatextra [1] with the
changes already merged in the github repository [2]?

[1] https://ctan.org/pkg/luatextra
[2] https://github.com/lualatex/luatextra/pull/1

-- 
Regards
Chris
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