p5-* perl module ports question

[raf]

Hi. All of the p5-* perl module ports have:

  perl5.branches      5.28 5.30 5.32 5.34

Why is that? There's a perl5.36 port,
and there are perl5.16-perl5.26 ports.

I'm curious. I was expecting to see a branch
for all available versions of perl5.

cheers,
raf