Update mercurial and hg-evolve

Mercurial package is updated with the latest edge upstream to
install mercurial 5.1.2 with py3. Evolve is updated to 9.2.1
and also installs with py3.

lists.sr.ht: remove unidiff dependency

meta.sr.ht/post-upgrade: run core.sr.ht migrations

man.sr.ht/post-upgrade: run core.sr.ht migrations

builds.sr.ht: add post-upgrade

py3-pgpy: upgrade to 0.5.2

Upgrade mercurial to 5.1

This mercurial patch release contains the fix for musl libc so we
can drop the hot patch here.

py3-stripe: upgrade to 2.32.1

py3-weasyprint: update to v48

py3-emailthreads: upgrade to 0.1.1

Add musl libc hotfix to mercurial, bump mercurial to 5.0

py3-srht: it's actually called py3-soupsieve

Add py3-soupselect to py3-srht dependencies

py3-soupsieve: new APKBUILD

Add py3-aiosmtpd to todo.sr.ht dependencies

git-send-email.io: bump pkgrel

py3-webencodings: bump pkgrel

py3-humanize: bump pkgrel

py3-beautifulsoup4: import from testing

Jesus christ fuck this package

py3-beautifulsoup4: import from testing