François Pantigny submitted an update to the
nicematrix
package.
Version number: 5.0 2020-07-15 License type: lppl1.3
Summary description: Improve the typesetting of mathematical matrices with PGF
Announcement text: ----------------------------------------------------------------------
In previous versions of nicematrix, it was mandatory, for technical reasons, to use the letters L, C and R instead of the letters l, c, r in the preambles of the environments of nicematrix.
In this version 5.0, one must use l, c and r.
For *compatibility* with previous versions, there is a key 'define-L-C-R' to use at load-time : usepackage[define-L-C-R]{nicematrix}
This version also provides a command abularnote to create tabular notes in {NiceTabular}. These tabular notes are composed at the bottom of the tabular.
In this version, it's also possible to use diagbox in a Block. ----------------------------------------------------------------------
This package is located at http://mirror.ctan.org/macros/latex/contrib/nicematrix
More information is at http://www.ctan.org/pkg/nicematrix
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Thanks for the upload.
For the CTAN Team Ina Dau