Prep for 5.32.1

[zakame]

cf https://www.nntp.perl.org/group/perl.perl5.porters/2021/01/msg258762.html

It might also be good to start integrating #24 as a sort of preview (limited to amd64, i386, arm64v8 for now) as previous testing with 5.32.0 was promising, and I'd like to see more feedback.