[LyX/master] Improve LaTeX version checking

[Jean-Marc Lasgouttes]

Le 11/01/2023 à 06:10, Jürgen Spitzmüller a écrit :
> Still, I think the current method is more convenient, since the day can
> almost always be omitted (ad we could even make the month optional,
> defaulting to 1 as well.

As you prefer. I still think that using the explicit date in out code 
has the added bonus that one can search easily this date in latex or 
packages changelog. In general it makes sense to check a precise date 
that points to a package version.

JMarc