libsyntax-perl binary package in Ubuntu Lunar amd64

 syntax is a Perl pragma for activating community-provided syntax extensions.
 It is similar to, but much more extensible than, the "feature" pragma, since
 it can load third-party extensions as well.
 .
 Because of the extensible nature of this module, there are no standardised
 options. Please consult the documentation for specific syntax features to
 learn about possible configuration options. See the are packages that have
 names like: libsyntax-keyword-*-perl.

Source package